SELECT 
  cscart_product_prices.product_id, 
  MIN(
    IF(
      cscart_product_prices.percentage_discount = 0, 
      cscart_product_prices.price, 
      cscart_product_prices.price - (
        cscart_product_prices.price * cscart_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_product_prices 
WHERE 
  cscart_product_prices.product_id IN (
    84954, 84953, 84952, 84950, 84948, 84906, 
    84905, 84904, 84903, 84902, 84901, 
    84900, 84899, 84898, 84897, 84896, 
    84895, 84628, 84627, 84600, 84599, 
    84597, 84943, 84942, 84919, 84918, 
    84917, 84916, 84915, 84639, 84549, 
    84977, 84811, 84810, 84809, 84808, 
    84807, 84806, 84805, 84804
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id