Hi,

Seems you have given wrong model name, there is no table named res.product by default in odoo, the table name for the Products is product.product.

Sample,

models.execute_kw(db, uid, password,
    'res.partner', 'search_read',
    [[['is_company', '=', True], ['customer', '=', True]]],
    {'fields': ['name', 'country_id', 'comment'], 'limit': 5})

Above given is a sample of reading the data from res.partner table based on some search condition.

You can go through this odoo documentation, explaining the same in detail :-  https://www.odoo.com/documentation/11.0/webservices/odoo.html

Thanks