This file is indexed.

/usr/lib/x86_64-linux-gnu/libnfft3.so.1 is in libnfft3-1 3.2.3+dfsg-1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/libnfft3.so.1.0.0