Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4262e576f9fc8b36223cb3586607e05f93cbda161645d825ea5cc773720bc358' 
  AND token = 'OF6ZLySs3sVWAjjFNbeS/WqtxqzYnQykmXoI0YpViRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}