SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '07dfc4a681b6c37b04978c19f869455383fbdc6e8393a6acb483b9309d537ecd' 
  AND token = 'sgd5OnkEMJ1tByAz01/+W17LQYnHRe2jYnw2kIkmvEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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