Sandbox

SELECT 
  v.product_id, 
  v.feature_id, 
  v.value, 
  v.value_int, 
  v.variant_id, 
  f.feature_type, 
  fd.description, 
  fd.prefix, 
  fd.suffix, 
  vd.variant, 
  f.parent_id, 
  f.position, 
  gf.position as gposition 
FROM 
  cscart_product_features as f 
  LEFT JOIN cscart_product_features_values as v ON v.feature_id = f.feature_id 
  LEFT JOIN cscart_product_features_descriptions as fd ON fd.feature_id = v.feature_id 
  AND fd.lang_code = 'en' 
  LEFT JOIN cscart_product_feature_variants fv ON fv.variant_id = v.variant_id 
  LEFT JOIN cscart_product_feature_variant_descriptions as vd ON vd.variant_id = fv.variant_id 
  AND vd.lang_code = 'en' 
  LEFT JOIN cscart_product_features as gf ON gf.feature_id = f.parent_id 
  AND gf.feature_type = 'G' 
WHERE 
  f.status IN ('A') 
  AND v.product_id in (5939, 5918, 5961, 5925) 
  AND f.display_on_catalog = 'Y' 
  AND (
    f.categories_path = '' 
    OR FIND_IN_SET(166, f.categories_path) 
    OR FIND_IN_SET(250, f.categories_path) 
    OR FIND_IN_SET(328, f.categories_path) 
    OR FIND_IN_SET(341, f.categories_path) 
    OR FIND_IN_SET(402, f.categories_path) 
    OR FIND_IN_SET(404, f.categories_path)
  ) 
  AND IF(
    f.parent_id, 
    (
      SELECT 
        status 
      FROM 
        cscart_product_features as df 
      WHERE 
        df.feature_id = f.parent_id
    ), 
    'A'
  ) IN ('A') 
  AND (
    v.variant_id != 0 
    OR (
      f.feature_type != 'C' 
      AND v.value != ''
    ) 
    OR (f.feature_type = 'C') 
    OR v.value_int != ''
  ) 
  AND v.lang_code = 'en' 
ORDER BY 
  fd.description, 
  fv.position

Query time 0.00318

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "50.19"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "v",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "fl",
              "variant_id",
              "lang_code",
              "product_id",
              "fpl",
              "idx_product_feature_variant_id"
            ],
            "key": "product_id",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 81,
            "rows_produced_per_join": 26,
            "filtered": "32.52",
            "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`v`.`product_id` in (5939,5918,5961,5925))",
            "cost_info": {
              "read_cost": "34.83",
              "eval_cost": "2.63",
              "prefix_cost": "37.46",
              "data_read_per_join": "20K"
            },
            "used_columns": [
              "feature_id",
              "product_id",
              "variant_id",
              "value",
              "value_int",
              "lang_code"
            ],
            "attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`v`.`lang_code` = 'en') and (`softwarepirmam_hewadelivard_cscart_4`.`v`.`feature_id` is not null))"
          }
        },
        {
          "table": {
            "table_name": "f",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "status"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "feature_id"
            ],
            "key_length": "3",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.v.feature_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "9.53",
            "cost_info": {
              "read_cost": "6.58",
              "eval_cost": "0.25",
              "prefix_cost": "46.68",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "feature_id",
              "feature_type",
              "categories_path",
              "parent_id",
              "display_on_catalog",
              "status",
              "position"
            ],
            "attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`f`.`status` = 'A') and (`softwarepirmam_hewadelivard_cscart_4`.`f`.`display_on_catalog` = 'Y') and ((`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path` = '') or (0 <> find_in_set(166,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`)) or (0 <> find_in_set(250,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`)) or (0 <> find_in_set(328,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`)) or (0 <> find_in_set(341,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`)) or (0 <> find_in_set(402,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`)) or (0 <> find_in_set(404,`softwarepirmam_hewadelivard_cscart_4`.`f`.`categories_path`))) and (if(`softwarepirmam_hewadelivard_cscart_4`.`f`.`parent_id`,(/* select#2 */ select `softwarepirmam_hewadelivard_cscart_4`.`df`.`status` from `softwarepirmam_hewadelivard_cscart_4`.`cscart_product_features` `df` where (`softwarepirmam_hewadelivard_cscart_4`.`df`.`feature_id` = `softwarepirmam_hewadelivard_cscart_4`.`f`.`parent_id`)),'A') = 'A') and ((`softwarepirmam_hewadelivard_cscart_4`.`v`.`variant_id` <> 0) or ((`softwarepirmam_hewadelivard_cscart_4`.`f`.`feature_type` <> 'C') and (`softwarepirmam_hewadelivard_cscart_4`.`v`.`value` <> '')) or (`softwarepirmam_hewadelivard_cscart_4`.`f`.`feature_type` = 'C') or (`softwarepirmam_hewadelivard_cscart_4`.`v`.`value_int` <> 0)))",
            "attached_subqueries": [
              {
                "dependent": true,
                "cacheable": false,
                "query_block": {
                  "select_id": 2,
                  "cost_info": {
                    "query_cost": "0.35"
                  },
                  "table": {
                    "table_name": "df",
                    "access_type": "eq_ref",
                    "possible_keys": [
                      "PRIMARY"
                    ],
                    "key": "PRIMARY",
                    "used_key_parts": [
                      "feature_id"
                    ],
                    "key_length": "3",
                    "ref": [
                      "softwarepirmam_hewadelivard_cscart_4.f.parent_id"
                    ],
                    "rows_examined_per_scan": 1,
                    "rows_produced_per_join": 1,
                    "filtered": "100.00",
                    "cost_info": {
                      "read_cost": "0.25",
                      "eval_cost": "0.10",
                      "prefix_cost": "0.35",
                      "data_read_per_join": "440"
                    },
                    "used_columns": [
                      "feature_id",
                      "status"
                    ]
                  }
                }
              }
            ]
          }
        },
        {
          "table": {
            "table_name": "fd",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "feature_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.v.feature_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.63",
              "eval_cost": "0.25",
              "prefix_cost": "47.56",
              "data_read_per_join": "5K"
            },
            "used_columns": [
              "feature_id",
              "description",
              "prefix",
              "suffix",
              "lang_code"
            ]
          }
        },
        {
          "table": {
            "table_name": "fv",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id"
            ],
            "key_length": "3",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.v.variant_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.63",
              "eval_cost": "0.25",
              "prefix_cost": "48.43",
              "data_read_per_join": "2K"
            },
            "used_columns": [
              "variant_id",
              "position"
            ]
          }
        },
        {
          "table": {
            "table_name": "vd",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "variant_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.fv.variant_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.63",
              "eval_cost": "0.25",
              "prefix_cost": "49.31",
              "data_read_per_join": "7K"
            },
            "used_columns": [
              "variant_id",
              "variant",
              "lang_code"
            ]
          }
        },
        {
          "table": {
            "table_name": "gf",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "feature_id"
            ],
            "key_length": "3",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.f.parent_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 2,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.63",
              "eval_cost": "0.25",
              "prefix_cost": "50.19",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "feature_id",
              "feature_type",
              "position"
            ],
            "attached_condition": "<if>(is_not_null_compl(gf), (`softwarepirmam_hewadelivard_cscart_4`.`gf`.`feature_type` = 'G'), true)"
          }
        }
      ]
    }
  }
}

Result

product_id	feature_id	value_int	variant_id	feature_type	description	variant	position
5961	657		7483	E	Brand	MIKROTIK	0
5918	657		7483	E	Brand	MIKROTIK	0
5925	657		7483	E	Brand	MIKROTIK	0
5939	657		7483	E	Brand	MIKROTIK	0
5961	656		1889	S	Color	Dark Gray	160
5939	656		1559	S	Color	white	160
5925	656		2077	S	Color	Grey	160
5918	656		2077	S	Color	Grey	160
5925	669	0.00	7637	S	Maximum Device Rate	Approx. 7.5 Gbps routing capacity	280
5961	669	0.00	7671	S	Maximum Device Rate	Up to 9.8 Gbps (routing throughput)	280
5939	669	0.00	7649	S	Maximum Device Rate	Up to 300 Mbps (2.4 GHz 802.11b/g/n)	280
5918	669		7610	S	Maximum Device Rate	Up to 470,000 packets per second (PPS)	280
5925	668		7625	S	Maximum User Capacity	Approx. 500-700 users	270
5939	668	0.00	7648	S	Maximum User Capacity	Approx. 20-30 users	270
5918	668		7609	S	Maximum User Capacity	Approx 200-300 users	270
5925	663		6795	S	Mounting Options	Rackmount (1U)	220
5939	663		6047	S	Mounting Options	Desktop / Wall	220
5961	663		6795	S	Mounting Options	Rackmount (1U)	220
5918	663		1977	S	Mounting Options	Desk, Wall, Ceiling, Junction Box	220
5925	665	13.00	7635	S	Network Ports	13 × Gigabit Ethernet	240
5939	665	5.00	7646	S	Network Ports	5 × 10/100BASE-T Ethernet	240
5961	665	10.00	7669	S	Network Ports	10 × Gigabit Ethernet (10/100/1000 Mbps), 1 × SFP+ 10 Gbps port	240
5918	665		7607	S	Network Ports	5 × Gigabit Ethernet (10/100/1000), 1 × SFP port (1.25 Gbps)	240
5925	666	0.00	7636	S	Power Support	Dual AC 100–240 V, DC input 20–57 V, PoE-IN	250
5939	666	8.00	7647	S	Power Support	8–30 V DC (Passive PoE IN), PoE OUT on Ether5	250
5918	666		7608	S	Power Support	Input: 12–57V DC (Passive PoE or adapter) Max Power Consumption: 11W	250
5961	666	0.00	7670	S	Power Support	Input: 12–57 V DC (passive PoE on port 1), Output: 57 V DC (PoE out on port 10)	250