Index is not used for row_end in UPDATE/DELETE

create table t (pk int primary key) with system versioning;

insert into t values (1), (2);

explain extended delete from t where pk=1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	SIMPLE	t	range	PRIMARY	PRIMARY	4	NULL	1	100.00	Using where

explain extended update t set pk=11 where pk=1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra

1	SIMPLE	t	range	PRIMARY	PRIMARY	4	NULL	1	100.00	Using where; Using buffer