This file is indexed.

/lib/x86_64-linux-gnu/libusb-1.0.so.0 is in libusb-1.0-0 2:1.0.21-2.

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

It is a symlink to /lib/x86_64-linux-gnu/libusb-1.0.so.0.1.0