SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 517 
ORDER BY 
  exception_id

Query time 0.00024

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
2767 517 a:2:{i:867;s:5:"17738";i:901;s:5:"18105";}
2768 517 a:2:{i:867;s:5:"17739";i:901;s:5:"18105";}
2769 517 a:2:{i:867;s:5:"17740";i:901;s:5:"18105";}
2770 517 a:2:{i:867;s:5:"17741";i:901;s:5:"18105";}