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 (
    63045, 63044, 63043, 63042, 63041, 63040, 
    63039, 63038, 63037, 63036, 63035, 
    63034, 63033, 63032, 63031, 63030, 
    63029, 63028, 63027, 63026, 63025, 
    63024, 63023, 63022, 63021
  ) 
  AND cscart_product_prices.lower_limit = 1 
  AND cscart_product_prices.usergroup_id IN (0, 1) 
GROUP BY 
  cscart_product_prices.product_id