With nginx I have

server {
  listen 1.2.3.4:80
  proxy_cache_valid       200 302 5m;
  location /  {
    try_files $uri @upstream;
    root $root;
  }
}

When I go http://example.com/foobar it generates a redirect to http://example.com/foobar?filter_distance=50&... which is visitor dependent so I would like to not cache this redirect. I need to bypass cache when the query string is empty. I am a bit lost because location /foobar will match both.