Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46a1da3f50d874023d5eecf0192a0a2f046590b886a066ba78268756f3d4ae8f' 
  AND token = 'Hlt8WEg0Hc0T6WHwifWigwT8WutSo+DsEFMsdkYm/GQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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