Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1584183eb1ea45b12d6111d0cb3c9fbb1f96ba7c98d7ba5fd6c593748a97b375' 
  AND token = '+v9U6Vn0lHm3L7vLIhW+sxF/NbIiIzmanfKT4FnDZaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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