SELECT 
  * 
FROM 
  cscart_product_options_inventory 
WHERE 
  product_id = 8863 
  AND combination_hash = '4240667401'

Query time 0.00029

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_options_inventory const PRIMARY,pc PRIMARY 4 const 1

Result

product_id product_code combination_hash combination amount temp position price weight min_qty max_qty qty_step list_qty_count aval_status
8863 ODV-GLL-CK04-1061B 4240667401 1130_23828 0.00 N 0 1245.53 27.25 0 0 0 0 2