diff --git a/neutron/db/migration/alembic_migrations/versions/EXPAND_HEAD b/neutron/db/migration/alembic_migrations/versions/EXPAND_HEAD
index 99229550c74..ae416390415 100644
--- a/neutron/db/migration/alembic_migrations/versions/EXPAND_HEAD
+++ b/neutron/db/migration/alembic_migrations/versions/EXPAND_HEAD
@@ -1 +1 @@
-4e6e655746f6
+659cbedf30a1
diff --git a/neutron/db/migration/alembic_migrations/versions/zed/expand/659cbedf30a1_add_index_to_subnetpools_address_scope_.py b/neutron/db/migration/alembic_migrations/versions/zed/expand/659cbedf30a1_add_index_to_subnetpools_address_scope_.py
new file mode 100644
index 00000000000..4b8050e75a5
--- /dev/null
+++ b/neutron/db/migration/alembic_migrations/versions/zed/expand/659cbedf30a1_add_index_to_subnetpools_address_scope_.py
@@ -0,0 +1,35 @@
+# Copyright 2022 OpenStack Foundation
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+#
+
+from alembic import op
+
+
+"""add index to subnetpools address_scope_id
+
+Revision ID: 659cbedf30a1
+Revises: 4e6e655746f6
+Create Date: 2022-06-01 13:39:35.303265
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '659cbedf30a1'
+down_revision = '4e6e655746f6'
+
+
+def upgrade():
+    index_name = 'ix_subnetpools_address_scope_id'
+    op.create_index(index_name, 'subnetpools', ['address_scope_id'],
+                    unique=False)
diff --git a/neutron/db/models_v2.py b/neutron/db/models_v2.py
index e7e02c0f9d6..75d39f36f4c 100644
--- a/neutron/db/models_v2.py
+++ b/neutron/db/models_v2.py
@@ -275,7 +275,7 @@ class SubnetPool(standard_attr.HasStandardAttributes, model_base.BASEV2,
                            server_default=sql.false())
     default_quota = sa.Column(sa.Integer, nullable=True)
     hash = sa.Column(sa.String(36), nullable=False, server_default='')
-    address_scope_id = sa.Column(sa.String(36), nullable=True)
+    address_scope_id = sa.Column(sa.String(36), nullable=True, index=True)
     prefixes = orm.relationship(SubnetPoolPrefix,
                                 backref='subnetpools',
                                 cascade='all, delete, delete-orphan',