Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '97d52d48899d00db6cb07e2c1f54cf51b6b0aefbea7bf0c4a96a4b290473b53d' 
  AND token = 'tSZo2t/kwUE/lhqyKmtJ4BoC9LhN3oiQ7r2r7HoOllE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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