Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '638fdfefa1458ee57308a20f474d1a5b6652b4789ae941a661ffdc196773799b' 
  AND token = 'vAEsFZJrUsdT6xTo/ZJc/UWngRDiJmiNdrGEOR1eJk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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