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 (
    14819, 14818, 39047, 14808, 14807, 23244, 
    23237, 14795, 14720, 14713, 14730, 
    14728, 14726, 14723, 14722, 14787, 
    14701, 76378, 76377, 14677, 14663, 
    14662, 14661, 14660, 14659, 14658, 
    14657, 14656, 14654, 14653, 14652, 
    14651, 14649, 14648, 14647, 14646, 
    14645, 14644, 14643, 14642
  ) 
GROUP BY 
  cscart_products_categories.product_id