SELECT 
  cscart_products_categories.product_id, 
  GROUP_CONCAT(
    IF(
      cscart_products_categories.link_type = "M", 
      CONCAT(
        cscart_products_categories.category_id, 
        "M"
      ), 
      cscart_products_categories.category_id
    )
  ) AS category_ids, 
  product_position_source.position AS position 
FROM 
  cscart_products_categories 
  INNER JOIN cscart_categories ON cscart_categories.category_id = cscart_products_categories.category_id 
  AND cscart_categories.storefront_id IN (0, 1) 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  LEFT JOIN cscart_products_categories AS product_position_source ON cscart_products_categories.product_id = product_position_source.product_id 
  AND product_position_source.category_id = 219 
WHERE 
  cscart_products_categories.product_id IN (
    4390, 4517, 4690, 4326, 4261, 4686, 4383, 
    4705, 4037, 4664, 4703, 4141, 4518, 
    4052, 4077, 4031, 4525, 4114, 4698, 
    4535, 4672, 4386, 3989, 4096, 4382, 
    4074, 4670, 4145, 4453, 4385, 4669, 
    4389, 4655, 4069, 4023, 4510, 4098, 
    4158, 4339, 4515, 4064, 4680, 4040, 
    4671, 3991, 4047, 4388, 4100, 3990, 
    4815, 4684, 4699, 4075, 4048, 4051, 
    4057, 4455, 4113, 4323, 4452, 4036, 
    4260, 4542, 4667, 4097, 4689, 4063, 
    4099, 4262, 4534, 4687, 4033, 4511, 
    4707, 4146, 4034, 4437, 4236, 4826, 
    4359
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00367

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "224.71"
    },
    "grouping_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_products_categories",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "pt"
            ],
            "key": "pt",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 178,
            "rows_produced_per_join": 178,
            "filtered": "100.00",
            "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`cscart_products_categories`.`product_id` in (4390,4517,4690,4326,4261,4686,4383,4705,4037,4664,4703,4141,4518,4052,4077,4031,4525,4114,4698,4535,4672,4386,3989,4096,4382,4074,4670,4145,4453,4385,4669,4389,4655,4069,4023,4510,4098,4158,4339,4515,4064,4680,4040,4671,3991,4047,4388,4100,3990,4815,4684,4699,4075,4048,4051,4057,4455,4113,4323,4452,4036,4260,4542,4667,4097,4689,4063,4099,4262,4534,4687,4033,4511,4707,4146,4034,4437,4236,4826,4359))",
            "cost_info": {
              "read_cost": "82.31",
              "eval_cost": "17.80",
              "prefix_cost": "100.11",
              "data_read_per_join": "2K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "product_position_source",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "pt"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "category_id",
              "product_id"
            ],
            "key_length": "6",
            "ref": [
              "const",
              "softwarepirmam_hewadelivard_cscart_4.cscart_products_categories.product_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 178,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "44.50",
              "eval_cost": "17.80",
              "prefix_cost": "162.41",
              "data_read_per_join": "2K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_categories",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "c_status",
              "p_category_id"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "category_id"
            ],
            "key_length": "3",
            "ref": [
              "softwarepirmam_hewadelivard_cscart_4.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 8,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "44.50",
              "eval_cost": "0.89",
              "prefix_cost": "224.71",
              "data_read_per_join": "27K"
            },
            "used_columns": [
              "category_id",
              "storefront_id",
              "usergroup_ids",
              "status"
            ],
            "attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`storefront_id` in (0,1)) and ((`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`usergroup_ids`))) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_categories`.`status` in ('A','H')))"
          }
        }
      ]
    }
  }
}