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 = 7184 
WHERE 
  cscart_products_categories.product_id IN (
    98102, 98103, 98104, 98105, 98106, 98107, 
    98108, 98109, 98110, 98111, 98112, 
    98113, 98114, 98115, 98116, 98117, 
    98118, 98119, 98120, 98121, 98122, 
    98123, 98124, 98125, 98126, 98127, 
    98128, 98129, 98130, 98131, 98132, 
    98133, 98134, 98135, 98136, 98137, 
    98169, 98170, 98171, 98172, 98173, 
    98174, 98175, 98176, 98177, 98178, 
    98179, 98180, 98181, 98182, 98183, 
    98184, 98185, 98186, 98187, 98188, 
    98189, 98190, 98191, 98200, 98201, 
    98202, 98203, 98204, 98205, 98206, 
    98207, 98327, 98328, 98329, 98330, 
    98331, 98332, 98333, 98334, 98335, 
    98336, 98337, 98338, 98339, 98340, 
    98341, 98342, 98343, 98344, 98345, 
    98346, 98347, 98348, 98349, 98350, 
    98351, 98352, 98353, 98354, 98355
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00267

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "95.66"
    },
    "grouping_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_products_categories",
            "access_type": "range",
            "possible_keys": [
              "PRIMARY",
              "link_type",
              "pt"
            ],
            "key": "pt",
            "used_key_parts": [
              "product_id"
            ],
            "key_length": "3",
            "rows_examined_per_scan": 168,
            "rows_produced_per_join": 168,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "17.12",
              "eval_cost": "16.80",
              "prefix_cost": "33.92",
              "data_read_per_join": "2K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (98102,98103,98104,98105,98106,98107,98108,98109,98110,98111,98112,98113,98114,98115,98116,98117,98118,98119,98120,98121,98122,98123,98124,98125,98126,98127,98128,98129,98130,98131,98132,98133,98134,98135,98136,98137,98169,98170,98171,98172,98173,98174,98175,98176,98177,98178,98179,98180,98181,98182,98183,98184,98185,98186,98187,98188,98189,98190,98191,98200,98201,98202,98203,98204,98205,98206,98207,98327,98328,98329,98330,98331,98332,98333,98334,98335,98336,98337,98338,98339,98340,98341,98342,98343,98344,98345,98346,98347,98348,98349,98350,98351,98352,98353,98354,98355))"
          }
        },
        {
          "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": [
              "nuie_scalesta_net.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 8,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "42.00",
              "eval_cost": "0.84",
              "prefix_cost": "92.72",
              "data_read_per_join": "21K"
            },
            "used_columns": [
              "category_id",
              "usergroup_ids",
              "status",
              "storefront_id"
            ],
            "attached_condition": "((`nuie_scalesta_net`.`cscart_categories`.`storefront_id` in (0,1)) and ((`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids` = '') or (0 <> find_in_set(0,`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids`)) or (0 <> find_in_set(1,`nuie_scalesta_net`.`cscart_categories`.`usergroup_ids`))) and (`nuie_scalesta_net`.`cscart_categories`.`status` in ('A','H')))"
          }
        },
        {
          "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",
              "nuie_scalesta_net.cscart_products_categories.product_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 8,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "2.10",
              "eval_cost": "0.84",
              "prefix_cost": "95.66",
              "data_read_per_join": "134"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        }
      ]
    }
  }
}