Laravel - Chunk update too slow (SQLSRV - MYSQL) - mysql

Question

I have a function in controller that selects the entire table Clients of a SQL Server database (remote, with less than 1 ms connection), and updates the Clients table in my MySQL DB, there are approx. 15000 rows.
When it was on development in my computer (Windows 10), used to take 24-26 seconds to complete the update. Now in the production server, it takes between 8 and 10 minutes. I tested the connection between my server and the SQL Server and is really fast, so the problem is not the SQL driver but MySQL.
Server: Ubuntu 18.04 LTS, CPU usage2.13% of 4 CPU(s), Memory usage 79.13% (6.26 GiB of 7.91 GiB)
MySQL Ver 5.7.32
Mytop: 50 qps (now) when running the fuction, Slow qps: 0.0, Key efficiency 50% (it was 97% before restarting MYSQL service)
Code
ClienteAsesorSql::where('Concepto', 'NOT LIKE', '%RESERVADO%')
->chunk(500, function ($clientes_asesor) {
foreach ($clientes_asesor as $clientes) {
$cliente_opyme = Cliente::updateOrCreate(['cli_id' => $clientes->ClienteId],[
'cli_id' => $clientes->ClienteId,
'cli_nombre' => $clientes->Concepto,
'cli_email' => $clientes['e-mail'],
'cli_telefono' => $clientes->Telefono,
'cli_movil' => $clientes->SMS,
'cli_domicilio' => $clientes->DomicilioNoFiscal,
'created_at' => $clientes->FechaEstado
]);
$cliente_opyme ->save();
}
});