How many time needs a Google Play update of my app to be published?

Solved, it takes about two hours, sometimes three hours

If you want your application published faster. You should publish as alpha before. Publishing as alpha is necessary for testing In App Billing and no one will see your application on alpha except your testers. When it comes to publish on production (normal publishing everyone can see this version), you should just upgrade from alpha to production and that’s it. Your application will be live on 10 minutes or less.