SELECT 
  pfv.feature_id, 
  pfv.product_id, 
  pfv.variant_id, 
  gp.group_id 
FROM 
  cscart_product_features_values AS pfv 
  INNER JOIN cscart_product_variation_group_products AS gp ON pfv.product_id = gp.product_id 
  INNER JOIN cscart_product_variation_group_features AS gpf ON gpf.group_id = gp.group_id 
  AND gpf.feature_id = pfv.feature_id 
WHERE 
  pfv.lang_code = 'en' 
  AND gp.group_id IN (
    620, 623, 260, 627, 608, 628, 410, 647, 
    559, 354, 433, 372, 642, 195, 646, 571, 
    306, 675, 305, 625, 409, 547, 261, 453, 
    562, 561, 556, 364, 363, 622, 621, 404, 
    282, 552, 661, 352, 564, 346, 345, 418, 
    252, 681, 155, 466, 666, 353, 381, 212, 
    266, 664, 383, 648, 432, 373, 382, 673, 
    689
  )

Query time 0.00340

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "159.61"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "gpf",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 57,
          "rows_produced_per_join": 57,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`gpf`.`group_id` in (620,623,260,627,608,628,410,647,559,354,433,372,642,195,646,571,306,675,305,625,409,547,261,453,562,561,556,364,363,622,621,404,282,552,661,352,564,346,345,418,252,681,155,466,666,353,381,212,266,664,383,648,432,373,382,673,689))",
          "cost_info": {
            "read_cost": "34.21",
            "eval_cost": "5.70",
            "prefix_cost": "39.91",
            "data_read_per_join": "5K"
          },
          "used_columns": [
            "feature_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "gp",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.gpf.group_id"
          ],
          "rows_examined_per_scan": 3,
          "rows_produced_per_join": 171,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "42.75",
            "eval_cost": "17.10",
            "prefix_cost": "99.76",
            "data_read_per_join": "2K"
          },
          "used_columns": [
            "product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "pfv",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "fl",
            "lang_code",
            "product_id",
            "fpl",
            "idx_product_feature_variant_id"
          ],
          "key": "fpl",
          "used_key_parts": [
            "feature_id",
            "product_id",
            "lang_code"
          ],
          "key_length": "12",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.gpf.feature_id",
            "softwarepirmam_hewadelivard_cscart_4.gp.product_id",
            "const"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 171,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "42.75",
            "eval_cost": "17.10",
            "prefix_cost": "159.61",
            "data_read_per_join": "132K"
          },
          "used_columns": [
            "feature_id",
            "product_id",
            "variant_id",
            "lang_code"
          ]
        }
      }
    ]
  }
}