SELECT 
  * 
FROM 
  cscart_product_options_exceptions 
WHERE 
  product_id = 8873 
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 3 Using where; Using filesort

Result

exception_id product_id combination
3105 8873 a:2:{i:1100;s:5:"20779";i:762;s:5:"16365";}
3106 8873 a:2:{i:1100;s:5:"20779";i:762;s:5:"16366";}
3107 8873 a:2:{i:1100;s:5:"20779";i:762;s:5:"16464";}