diff --git a/app/app/models.py b/app/app/models.py
index 8807dc0..9293617 100644
--- a/app/app/models.py
+++ b/app/app/models.py
@@ -3184,7 +3184,7 @@ class MessageIDMatching(Base, ModelMixin):
 
     # to track what email_log that has created this matching
     email_log_id = sa.Column(
-        sa.ForeignKey("email_log.id", ondelete="cascade"), nullable=True
+        sa.ForeignKey("email_log.id", ondelete="cascade"), nullable=True, index=True
     )
 
     email_log = orm.relationship("EmailLog")
diff --git a/app/migrations/versions/2023_100510_46ecb648a47e_.py b/app/migrations/versions/2023_100510_46ecb648a47e_.py
new file mode 100644
index 0000000..8fc2cdf
--- /dev/null
+++ b/app/migrations/versions/2023_100510_46ecb648a47e_.py
@@ -0,0 +1,39 @@
+"""empty message
+
+Revision ID: 46ecb648a47e
+Revises: ec7fdde8da9f
+Create Date: 2023-10-05 10:43:35.668902
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "46ecb648a47e"
+down_revision = "ec7fdde8da9f"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.get_context().autocommit_block():
+        op.create_index(
+            op.f("ix_message_id_matching_email_log_id"),
+            "message_id_matching",
+            ["email_log_id"],
+            unique=False,
+        )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.get_context().autocommit_block():
+        op.drop_index(
+            op.f("ix_message_id_matching_email_log_id"),
+            table_name="message_id_matching",
+        )
+    # ### end Alembic commands ###