MariaDB Query Optimizer ignores index

Question

• MariaDB Version 10.5.15
• simple Table, two columns with an index

If I make a query on a table and use two columns in the where conndition that have an index, no index is used. Why?

CREATE TABLE `logs` (
  `log_id` int(10) NOT NULL AUTO_INCREMENT,
  `date` datetime DEFAULT NULL,
  `status` int(10) DEFAULT 0,
  `text` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`log_id`),
  KEY `status` (`status`),
  KEY `date` (`date`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Where date

analyze select count(*)
from logs 
where `date` < "2022-01-01 00:00:00"

uses index => 1.4s

id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	logs	range	date	date	6		5416235	7969250.00	100	100	Using where; Using index

Where status

analyze select count(*)
from logs 
where status = 860

uses index => ~0.9s

id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	logs	ref	status	status	5	const	5416235	5536942.00	100	100	Using index

Where date AND status

analyze select count(*)
from logs 
where status = 860
and `date` < "2022-01-01 00:00:00"

uses no index => ~7s

id	select_type	table	type	possible_keys	key	key_len	ref	rows	r_rows	filtered	r_filtered	Extra
1	SIMPLE	logs	ALL	status,date				10832494	11430473.00	25	43.85	Using where

Answer 1

ALTER TABLE logs
    DROP INDEX(status)
    ADD INDEX(status, date)

The added "composite" index will help both

WHERE status = ...

and

WHERE status = ... AND date < ...

and also

WHERE date < ... AND status = ...