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 = 1 
WHERE 
  cscart_products_categories.product_id IN (
    14641, 14640, 14637, 14635, 14634, 14633, 
    14632, 14631, 14630, 14629, 14628, 
    14627, 14626, 14481, 14480, 14482, 
    24684, 24683, 14436, 14434, 14438, 
    14437, 14411, 16539, 14409, 14410, 
    14101, 14138, 14137, 31447, 31446, 
    31445, 31444, 31443, 31442, 31441, 
    31440, 31439, 31438, 31437
  ) 
GROUP BY 
  cscart_products_categories.product_id