Request shown in slow logs

Question

In my MYSQL configuration I activated logging of request not using indexes.

slow_query_log=1
slow_query_log_file = /home/mysql/sqlprive.log
long_query_time=7
log_queries_not_using_indexes =1

But in my log file I find some requests that are not slow and are using indexes:

# Query_time: 0.001160  Lock_time: 0.000188 Rows_sent: 10  Rows_examined: 20
SELECT `t`.`id` AS `t0_c0`, `t`.`nom` AS `t0_c2`, some others fields whitout indexes
FROM `my_table` `t` GROUP BY t.id ORDER BY t.name ASC
LIMIT 10 OFFSET 10;

Here is the structure of my table

CREATE TABLE IF NOT EXISTS `my_table` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  #some other fields whitout any indexes
  PRIMARY KEY (`id`),
  UNIQUE KEY `name` (`name`),
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1060 ;

Someone has an idea why I find this kind of request in the slow log file?