Something like this:
SELECT
*
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS
WHERE CONSTRAINT_NAME ='FK_TreeNodesBinaryAssets_BinaryAssets'
and TABLE_NAME = 'TreeNodesBinaryAssets'
but for indexes.
You can do it using a straight forward select like this:
SELECT *
FROM sys.indexes
WHERE name='YourIndexName' AND object_id = OBJECT_ID('Schema.YourTableName')