SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'b9bac0049d769d6488bc5a87a3dad7eafc14fa332589577de1402803e66fdeda' 
  AND token = 'kYCVCgiMhyHsGO0CYBn13Wz5eSO6jZWlF49RJn7wPpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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