diff -r 2cb8d11aa9ca -r 8ff8e2aee0f9 src/notes/models/base.py
--- a/src/notes/models/base.py	Tue Jul 18 17:59:28 2017 +0200
+++ b/src/notes/models/base.py	Wed Jul 19 15:57:13 2017 +0200
@@ -15,8 +15,8 @@
 class Model(models.Model):
     objects = ModelManager()
 
-    created = models.DateTimeField(auto_now_add=True, verbose_name=_('Model|created'))
-    updated = models.DateTimeField(auto_now=True, verbose_name=_('Model|updated'))
+    created = models.DateTimeField(auto_now_add=True, verbose_name=_('Model|created'), db_index=True)
+    updated = models.DateTimeField(auto_now=True, verbose_name=_('Model|updated'), db_index=True)
     ext_id = models.UUIDField(unique=True, default=uuid.uuid4, verbose_name=_('Model|ext_id'))
     version = AutoIncVersionField(verbose_name=_('Model|version'))