High CPU usage on database with UPDATE `oc_authtoken`

Hello,
The MySQL server running my nextcloud db have a high CPU usage, there is constant request like this one:
UPDATE `oc_authtoken` SET `password` = 'xxx' WHERE `id` = yyy
There is around 10 requests in the same time which commit, updating (max 1sec time running each).
I don’t have any errors in logs (nextcloud or nginx). Same problem after restart services
If someone have an idea :slight_smile:
Thanks

My config:

Nextcloud version: 21.0.1.1
Operating system and version: Debian 10
nginx version: 1.20.0-1
PHP version: 7.4.18-2
mysql version: mysql Ver 15.1 Distrib 10.5.10-MariaDB,

<?php
$CONFIG = array (
  'updatechecker' => true,
  'instanceid' => 'xxxx',
  'passwordsalt' => 'xxxx',
  'secret' => 'xxxx',
  'trusted_domains' => 
  array (
    0 => 'mydomain',
    1 => '192.168.1.x',
  ),
  'datadirectory' => '/mnt/disk/nextcloud',
  'version' => '21.0.1.1',
  'dbtype' => 'mysql',
  'dbname' => 'nextcloud',
  'dbhost' => '192.168.1.x',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'nextcloud',
  'dbpassword' => 'xxx',
  'logtimezone' => 'Europe/Paris',
  'installed' => true,
  'default_language' => 'fr',
  'enable_previews' => true,
  'preview_max_x' => 1024,
  'preview_max_y' => 1024,
  'preview_max_scale_factor' => 1,
  'mail_smtpmode' => 'smtp',
  'mail_from_address' => 'cloud',
  'mail_domain' => 'xxx',
  'maintenance' => false,
  'overwriteprotocol' => 'https',
  'defaultapp' => 'files',
  'log_type' => 'file',
  'mail_smtpauthtype' => 'PLAIN',
  'filelocking.enabled' => true,
  'theme' => '',
  'mail_smtphost' => 'mail',
  'mail_smtpport' => '25',
  'overwrite.cli.url' => 'xxx',
  'loglevel' => 2,
  'logfile' => '/var/log/nextcloud.log',
  'mysql.utf8mb4' => true,
  'has_rebuilt_cache' => true,
  'trashbin_retention_obligation' => '30,60',
  'updater.release.channel' => 'stable',
  'memcache.local' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' => 
  array (
    'host' => '/var/run/redis/redis.sock',
    'port' => 0,
  ),
  'app_install_overwrite' => 
  array (
    0 => 'files_external_onedrive',
  ),
  'trusted_proxies' =>  ['192.168.1.1'],
);

Hello
I suppose there was a migration or something like that, there is no more those requests.