Php connection to mysql should be automatically disconnected, but it is blocked by GET_LOCK?

The code for accessing localhostci is as follows (that is, after a lock is applied). After I use Navicat to establish a connection, call the command line, and lock the connection, I find it blocked: why? The connection to php should be released. ps: the environment is windows + nginx + php + mysql.

Access localhost/ci
The code is as follows (the lock is applied)

After that,
I used Navicat to establish a connection, call the command line, lock it, and find it blocked:

Why? The php connection should be released.
Ps:
The environment is windows + nginx + php + mysql

Reply content:

Access localhost/ci
The code is as follows (the lock is applied)

After that,
I used Navicat to establish a connection, call the command line, lock it, and find it blocked:

Why? The php connection should be released.
Ps:
The environment is windows + nginx + php + mysql

Unlock after locking

Unlock tables

Or

Rollback

Select release_lock ('lock1 ');

Release Lock