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 = 6 
WHERE 
  cscart_products_categories.product_id IN (
    69744, 70160, 70124, 70080, 69934, 70084, 
    70083, 70079, 70078, 69981, 69817, 
    69729, 69623, 70081, 69727, 69777, 
    69979, 69906, 69874, 69504, 69983, 
    68700, 69905, 69574, 69826, 69754, 
    69825, 69468, 69755, 69753, 69614, 
    69548, 68699, 69704, 69703, 69700, 
    69699, 69347, 69318, 69619
  ) 
GROUP BY 
  cscart_products_categories.product_id