lock_sec_rec_read_check_and_lock(): Remove a redundant check
for trx_sys.get_min_trx_id(). This would be checked in
lock_sec_rec_some_has_impl() anyway. Also, test the
cheapest conditions first.

lock_sec_rec_some_has_impl(): Replace trx_sys.get_min_trx_id()
with trx_sys.find_same_or_older() that is much easier to evaluate.

Inspired by mysql/mysql-server@0a0c0db97e9c9705f4dffc629a770fb87a60cb22