Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b8cf7eb42063c5c04b86d0780d8ef9529fa9159a60290269cfbe74b24ebc955' 
  AND token = 'N2UPtG+eiy6Z04OWLNgGYtk7A2IZ+h9R5/5xG+GYWG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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