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 = 7148 
WHERE 
  cscart_products_categories.product_id IN (
    92399, 92346, 88141, 88144, 82448, 84250, 
    84255, 87578, 87579, 87593, 87594, 
    87608, 87609, 88151, 88153, 88789, 
    88790, 88939, 92198, 92199, 92200, 
    92201, 92202, 92444, 92445, 92446, 
    92447, 87653, 87667, 87674, 87681, 
    87702, 87710, 87711, 87724, 87725, 
    90126, 90129, 82360, 91901, 91902, 
    91903, 92345, 92347, 92348, 92146, 
    84702, 84705, 91052, 87652, 87658, 
    87666, 87672, 87673, 87679, 87680, 
    87686, 87701, 87707, 87709, 87721, 
    87723, 87735, 88694, 88695, 88741, 
    88742, 84697, 84698, 88946, 88947, 
    88948, 82404, 88140, 88143, 88508, 
    87252, 87253, 87254, 87255, 87256, 
    87257, 87258, 87259, 88102, 88103, 
    92203, 92449, 82551, 82342, 87890, 
    82367, 88943, 88944, 88945, 92168
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.00268

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "113.83"
    },
    "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": 200,
            "rows_produced_per_join": 200,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "20.33",
              "eval_cost": "20.00",
              "prefix_cost": "40.33",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (92399,92346,88141,88144,82448,84250,84255,87578,87579,87593,87594,87608,87609,88151,88153,88789,88790,88939,92198,92199,92200,92201,92202,92444,92445,92446,92447,87653,87667,87674,87681,87702,87710,87711,87724,87725,90126,90129,82360,91901,91902,91903,92345,92347,92348,92146,84702,84705,91052,87652,87658,87666,87672,87673,87679,87680,87686,87701,87707,87709,87721,87723,87735,88694,88695,88741,88742,84697,84698,88946,88947,88948,82404,88140,88143,88508,87252,87253,87254,87255,87256,87257,87258,87259,88102,88103,92203,92449,82551,82342,87890,82367,88943,88944,88945,92168))"
          }
        },
        {
          "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": 10,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "50.00",
              "eval_cost": "1.00",
              "prefix_cost": "110.33",
              "data_read_per_join": "26K"
            },
            "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": 10,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "2.50",
              "eval_cost": "1.00",
              "prefix_cost": "113.83",
              "data_read_per_join": "160"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "position"
            ]
          }
        }
      ]
    }
  }
}