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 (
    44452, 44451, 44450, 44449, 44448, 44447, 
    44446, 44445, 44444, 44443, 44442, 
    44441, 44440, 44439, 44438, 44437, 
    44436, 44435, 44434, 44433, 44432, 
    44431, 44430, 44429, 44428
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id