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 (
    77716, 77715, 77714, 77713, 77712, 77711, 
    77710, 77709, 77708, 77707, 77706, 
    77705, 77704, 77703, 77702, 77701, 
    77700, 77699, 77698, 77697, 77696, 
    77695, 77694, 77693, 77692, 77691, 
    77690, 77689
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id