How to increase MaxProcessLifeTime

i install WordPress and i try to install a pre-made demo on my site.
but it always fail.

we have found out that was a time limit in processing (2min).

we try to add those code:

fastcgi_send_timeout=300
fastcgi_connect_timeout=60;
fastcgi_read_timeout=300

but still not work.

how can i get fix this?