Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feba7e460e1385e2eb9a051003e831f3037997e6faae9c7f515ee146f97aa193' 
  AND token = 'ytoA0jJyyUBF098UCNPsusZZeSWUbzk3jGP8mbooWjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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