How to correctly write an exception rule for a redirect?

Question

htaccess

Hello! I can’t figure out what I’m writing crookedly in the .htaccess file
. Actually, the rule itself:

RewriteEngine On
RewriteCond %{QUERY_STRING} !^route=checkout/success$
RewriteRule ^uk/index(.*)$ https://domain.com.ua/uk/simplecheckout/? [R=301,L]

The task is to redirect to https://domain/uk/index.php?route=checkout/success
when placing an order in ocstore In all other cases, to https://domain.com.ua/uk/simplecheckout/
Redirect works, but there is no exception ((
What is wrong in the code? And how is it right?