How to make one page without a slash on a site with a url with a slash?

Question

htaccess

There is a site where there is a 301 redirect to pages with a slash. There was a need to make one page so that it redirects to without a slash. (This is necessary for parsing by a third-party service, which we cannot influence, and it only works with a url without a slash).
I tried different options from the Internet. Now the following code is registered in .htaccess:

RewriteCond %{REQUEST_URI} !\?
  RewriteCond %{REQUEST_URI} !\&
  RewriteCond %{REQUEST_URI} !\=
  RewriteCond %{REQUEST_URI} !\.
  RewriteCond %{REQUEST_URI} !\/$
  RewriteCond %{REQUEST_FILENAME} /food/
  RewriteRule ^food/$ /food [R=301,L]

But doesn't work. The page without the slash returns a 403 Forbidden response.
How can this be implemented?