Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bd6f541c62ece27c2ef7bef90f2926863ac1a1f659979aca40e44e18ac1373a' 
  AND token = 'ovnVscOt9endbjIyDA1IdjPnWwkZxbnnuC3KcLZMla8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}