SELECT 
  l.label_id, 
  l.name, 
  pl.writer_split, 
  pl.split_condition 
FROM 
  cscart_label_manager_product_labels pl, 
  cscart_label_manager_labels l 
WHERE 
  l.status = 'A' 
  AND pl.label_id = l.label_id 
  AND pl.product_id = 111561

Query time 0.00017

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE pl ref product_id,label_id product_id 3 const 1
1 SIMPLE l eq_ref PRIMARY,status PRIMARY 3 toolboxdigitalshop_dev.pl.label_id 1 Using where