diff --git a/superset/sql_lab.py b/superset/sql_lab.py
index ae135705018..b98eb3a6e03 100644
--- a/superset/sql_lab.py
+++ b/superset/sql_lab.py
@@ -162,8 +162,14 @@ def get_query(query_id: int) -> Query:
         return db.session.query(Query).filter_by(id=query_id).one()
     except Exception as ex:
         # roll back so a poisoned session (e.g. PendingRollbackError after a
-        # failed flush) doesn't fail every subsequent backoff retry identically
-        db.session.rollback()
+        # failed flush) doesn't fail every subsequent backoff retry identically.
+        # Swallow rollback failures so a session/connection too broken to roll
+        # back doesn't replace the original exception with one the backoff
+        # decorator won't retry on.
+        try:
+            db.session.rollback()
+        except Exception:  # pylint: disable=broad-except
+            logger.warning("Failed to roll back session in get_query", exc_info=True)
         raise SqlLabException("Failed at getting query") from ex
 
 
diff --git a/tests/unit_tests/sql_lab_test.py b/tests/unit_tests/sql_lab_test.py
index ec2745639b9..313c556a945 100644
--- a/tests/unit_tests/sql_lab_test.py
+++ b/tests/unit_tests/sql_lab_test.py
@@ -37,6 +37,7 @@ from superset.sql_lab import (
     execute_sql_statements,
     get_query,
     get_sql_results,
+    SqlLabException,
 )
 from superset.utils.rls import apply_rls, get_predicates_for_table
 from tests.conftest import with_config
@@ -100,6 +101,30 @@ def test_get_query_rolls_back_session_before_retrying(
     mock_rollback.assert_called_once()
 
 
+def test_get_query_swallows_rollback_failure(
+    mocker: MockerFixture, app: SupersetApp
+) -> None:
+    """
+    If the session/connection is too broken for `rollback()` itself to succeed,
+    that failure must not replace the original lookup error: `get_query` still
+    needs to raise `SqlLabException` so the `backoff` decorator's retry contract
+    (which only matches on `SqlLabException`) isn't bypassed.
+    """
+    mocker.patch("backoff._sync.time.sleep")
+
+    mock_one = mocker.patch("superset.sql_lab.db.session.query")
+    mock_one.return_value.filter_by.return_value.one.side_effect = Exception(
+        "session is broken"
+    )
+    mocker.patch(
+        "superset.sql_lab.db.session.rollback",
+        side_effect=Exception("connection already closed"),
+    )
+
+    with pytest.raises(SqlLabException):
+        get_query(query_id=1)
+
+
 @with_config(
     {
         "SQLLAB_PAYLOAD_MAX_MB": 50,