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 = 7143 
WHERE 
  cscart_products_categories.product_id IN (
    98282, 98283, 98284, 98285, 98286, 98287, 
    98288, 98289, 98290, 98291, 98292, 
    98293, 98294, 98295, 98296, 98297, 
    98298, 98299, 98300, 98301, 98302, 
    98303, 98304, 98305, 98306, 98307, 
    98308, 98309, 98310, 98311, 98312, 
    98313, 98314, 98315, 98316, 98317, 
    98318, 98319, 98320, 98321, 98482, 
    98572, 98573, 98574, 98575, 98576, 
    98577, 98578, 98579, 98580, 98581, 
    98582, 98583, 98584, 98585, 98586, 
    98687, 98688, 98689, 98690, 98691, 
    98692, 98693, 98694, 98695, 98696, 
    98697, 98698, 98699, 98700, 98701, 
    98702, 98703, 98704, 98705, 98706, 
    98707, 98708, 98709, 98710, 98711, 
    98712, 98713, 98714, 98715, 98738, 
    98739, 98740, 98741, 98742, 98743, 
    98744, 98745, 98746, 98747, 98748
  ) 
GROUP BY 
  cscart_products_categories.product_id

Query time 0.01644

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "112.80"
    },
    "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": 125,
            "rows_produced_per_join": 125,
            "filtered": "100.00",
            "using_index": true,
            "cost_info": {
              "read_cost": "12.81",
              "eval_cost": "12.50",
              "prefix_cost": "25.31",
              "data_read_per_join": "1K"
            },
            "used_columns": [
              "product_id",
              "category_id",
              "link_type"
            ],
            "attached_condition": "(`nuie_scalesta_net`.`cscart_products_categories`.`product_id` in (98282,98283,98284,98285,98286,98287,98288,98289,98290,98291,98292,98293,98294,98295,98296,98297,98298,98299,98300,98301,98302,98303,98304,98305,98306,98307,98308,98309,98310,98311,98312,98313,98314,98315,98316,98317,98318,98319,98320,98321,98482,98572,98573,98574,98575,98576,98577,98578,98579,98580,98581,98582,98583,98584,98585,98586,98687,98688,98689,98690,98691,98692,98693,98694,98695,98696,98697,98698,98699,98700,98701,98702,98703,98704,98705,98706,98707,98708,98709,98710,98711,98712,98713,98714,98715,98738,98739,98740,98741,98742,98743,98744,98745,98746,98747,98748))"
          }
        },
        {
          "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": 125,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "31.25",
              "eval_cost": "12.50",
              "prefix_cost": "69.06",
              "data_read_per_join": "1K"
            },
            "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": [
              "nuie_scalesta_net.cscart_products_categories.category_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 6,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "31.25",
              "eval_cost": "0.63",
              "prefix_cost": "112.81",
              "data_read_per_join": "16K"
            },
            "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')))"
          }
        }
      ]
    }
  }
}