Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11a481e74feb0a3b8277b44043114b7db211a3ec52f513d82fce2a632d47198f' 
  AND token = 'sOITinlZYbEYA3zSTaS/0TXaZp4xcByJEr79EGMZaKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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