SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 8871 
ORDER BY 
  exception_id

Query time 0.00070

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 3 Using where; Using filesort

Result

exception_id product_id combination
3111 8871 a:2:{i:1102;s:5:"20823";i:762;s:5:"16365";}
3112 8871 a:2:{i:1102;s:5:"20823";i:762;s:5:"16464";}
3113 8871 a:2:{i:1102;s:5:"20823";i:762;s:5:"16366";}