string connStr = $"server=sql168.main-hosting.eu;user=u192471211_myuss;database=u192471211_myuss;password=finld12;";
MySqlConnection conn = new MySqlConnection(connStr);
conn.Open();

DateTime d1;
try
{
    string sql = $"SELECT subscribe FROM myusers WHERE hwid = '{hwid}'";
    MySqlCommand command = new MySqlCommand(sql, conn);
    string date = command.ExecuteScalar().ToString();

    var client = new TcpClient("time.nist.gov", 13);
    using (var streamReader = new StreamReader(client.GetStream()))
    {
        var response = streamReader.ReadToEnd();
        var utcDateTimeString = response.Substring(7, 17);
        d1 = DateTime.ParseExact(utcDateTimeString, "yy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal);
    }

    DateTime d2 = Convert.ToDateTime(date);
    TimeSpan time = d2 - d1;

    int days = time.Days;

    if (days > 0)
    {
        btnLic.Text = $"Осталось {days} дней подписки";
        btnBuyOrStart.Text = "Запустить";
        status = true;
    }
}
catch (Exception ex)
{
    btnLic.Text = "Не удалось подключиться";
}