mysql your_database;
Check the value
select * from ps_configuration where name like '%SSL_ENABLED%';
To enable
update ps_configuration set value = '1' where name = 'PS_SSL_ENABLED';
update ps_configuration set value = '1' where name = 'PS_SSL_ENABLED_EVERYWHERE';
To disable
update ps_configuration set value = '0' where name = 'PS_SSL_ENABLED';
update ps_configuration set value = '0' where name = 'PS_SSL_ENABLED_EVERYWHERE';