Debug unclosed connections and network issues

Hello, i have a problem in MySQL when i use MySQL Tuner it's suggest to "Reduce or eliminate unclosed connections and network issues". I see in "SHOW PROCESSLIST" in MySQL and it's looks like this :

Id	User	Host	db	Command	Time
5	event_scheduler	localhost	null	Daemon	53171
407	technomed_user	127.0.0.1:58242	technomed_asia	Sleep	2
408	technomed-adm	156.67.210.123:48898	technomed_new_beta	Sleep	0
409	technomed_user	127.0.0.1:58254	technomed_asia	Sleep	0
410	technomed_user	127.0.0.1:58258	technomed_asia	Sleep	0
411	technomed_user	127.0.0.1:48950	technomed_asia	Sleep	1
412	technomed-adm	156.67.210.123:50712	technomed_new_beta	Sleep	0
413	technomed_user	127.0.0.1:48958	technomed_asia	Sleep	3
414	technomed-adm	156.67.210.123:50724	technomed_new_beta	Sleep	3
415	technomed_user	127.0.0.1:48966	technomed_asia	Sleep	3
416	technomed-adm	156.67.210.123:50730	technomed_new_beta	Sleep	1
417	technomed_user	127.0.0.1:48970	technomed_asia	Sleep	3
418	technomed-adm	156.67.210.123:50738	technomed_new_beta	Sleep	2
419	technomed-adm	156.67.210.123:50750	technomed_new_beta	Sleep	2
420	technomed_user	127.0.0.1:53564	technomed_asia	Sleep	1
421	technomed-adm	156.67.210.123:55378	technomed_new_beta	Sleep	2
422	technomed-adm	156.67.210.123:55386	technomed_new_beta	Sleep	1
472	technomed-adm	103.167.218.50:59791	technomed_asia	Query	0

How to debug that in laravel? I want to know why the connection is unclosed.

Thank you.

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