Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'eee18750f673a844f529cec8ab6fd2b3221b35b07adf41dfbb24e942225b9f8a' 
  AND token = 'O0gmoy2TKbn4po/1kKR607+EqMuFiLXtgqC0KVTbXEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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