Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c4cd4825d2928fb1480da81be1f62ac3e97a5e64c14ddf26ed89929e8c41d74' 
  AND token = 'Y+KQ4B4xrO7IWIt1NT7Fdzt/tXSzJEQVZOQ+Mx3CbFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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