SELECT 
  * 
FROM 
  cscart_product_options_inventory 
WHERE 
  product_id = 9855 
  AND combination_hash = '3795022446'

Query time 0.00061

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
9855 ODV-MSL-CK01-5060S 3795022446 510_13248 0.00 N 0 1296.75 32.25 0 0 0 0 125