Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd62b960567a087d656a068dba1cefa70972e1a9b2e93a2119e825ff2b8bf0bf5' 
  AND token = 'sTyIWzqD+dbcfZMBxPF4e/qWK8j+Vne2+Pf6FQan4to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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