SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 524 
ORDER BY 
  exception_id

Query time 0.00025

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_options_exceptions ref product product 3 const 4 Using where; Using filesort

Result

exception_id product_id combination
2775 524 a:2:{i:871;s:5:"17756";i:903;s:5:"18115";}
2776 524 a:2:{i:871;s:5:"17757";i:903;s:5:"18115";}
2777 524 a:2:{i:871;s:5:"17758";i:903;s:5:"18115";}
2778 524 a:2:{i:871;s:5:"17759";i:903;s:5:"18115";}