SELECT 
  * 
FROM 
  cscart_product_options_inventory 
WHERE 
  product_id = 9963 
  AND combination_hash = '2113591171'

Query time 0.00024

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
9963 SKY-LSB-407R-S SKY-KOF-0407-S 2113591171 617_15141_1170_22148_1171_22163 24.00 N 0 1244.00 42.00 0 0 0 0 1