What is the difference between regular reviewing and fast reviewing?

The duration of the article review process in the ordinary arbitration service from the time of receiving the article to its acceptance is a maximum of six months, but in the fast arbitration service this period is a maximum of one month.

When can I receive the doi code after accepting the article?

In the time after the layout

Is it possible for the article to be rejected by the editor before being sent to the reviewer, despite the fact that the initial review of the article has been paid for?