Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca81cc5b63b2e805bda82b4792f4ee6ca31a11c9e4df6500113f86840c3d1ba8' 
  AND token = 'fNSj7PVozI6Zf0EJfF3b94Lpx5jdl5U4V++QnIYrfJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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