SELECT 
  * 
FROM 
  cscart_product_options_inventory 
WHERE 
  product_id = 9844 
  AND combination_hash = '933164600'

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
9844 ODV-DML-C02-0705K 933164600 1158_21894_955_18540_1154_21870_1155_21886 0.00 N 160 704.00 1.00 0 0 0 0 15