Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'caf6bedab7358dc54401f789f393ecdea92633f30e3cb429072ffdd9a3b9201c' 
  AND token = '8yujCRnWCU1o2xC7dPJncknNg2Ei1IMZH9nA9HkpDGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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