Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801534cadaf1c3995ec850246e72d2f01b5a18b69eed39a39ce6455458ed5ab4' 
  AND token = '9yjskSTkrA2s8Nra6KiLUYxSHyXpiFemPVm+bhE7mAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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