Redirect from https to http does not work, why?

Question

Digital certificates

The ssl certificate has ended, I don’t plan to renew it, I disabled it in the panel, the site opens via a direct url using the http protocol, but the redirect does not work if I try to open it via the https protocol.
Added to htaccess:

RewriteEngine On
RewriteCond %{SERVER_PORT} ^443$ [OR]
RewriteCond %{HTTPS} =on
RewriteRule ^(.*)$ http://mysite.com/$1 [R=301,L]

I see such a picture:

Site on reg ru.

Answer 1

End of ssl certificate

The thing is, it's over. The browser sees that the certificate has expired and does not allow you to connect to the site, as a result of which the redirect does not work