How to get rid of doing_wp_cron in a website link?

Question

Regular Expressions

There is a website with cron scripts. Therefore, a parameter periodically appears in the browser link.
On a regular site, I wrote in .htaccess:

<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{QUERY_STRING} (^|&)doing_wp_cron= [NC]
RewriteRule (.*) /$1? [R=301,L]
</IfModule>

But this site is subnetted and there is a multisite.
those. the site has the address lp.saishn.ru/event-promo/
Apparently something in the regular expression needs to be changed?