This file is indexed.

/usr/share/glib-2.0/schemas/10_gnome-keyring.gschema.override is in gnome-keyring 3.2.2-2ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[org.gnome.crypto.pgp]
keyservers=['hkp://keyserver.ubuntu.com:11371', 'hkp://pool.sks-keyservers.net', 'ldap://keyserver.pgp.com']