You can use this rule in your root .htaccess:
RewriteEngine On
RewriteCond %{THE_REQUEST} \s/+store/index[?\s/] [NC]
RewriteRule ^ /? [R=301,L]
RewriteRule ^/?$ /store/index [L]
- You need to match
^/?$
to make sure you're only rewriting home page - You must not use
R
flag to avoid URL changing in browser