Thanks. This is exactly what I'have figured out and forgot to post here.
Bottom line is that my approach, due to lack of knowledge, was wrong. static=false is a parameter which is not taken into account when NginX is making regex for 'location' block. 'Query string' is something I had to focus on. It is nicely described here: http://nginx.org/en/docs/http/request_processing.html#simple_php_site_configuration .
Thanks all for a help!