Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a31979db7841b8c6bb1604b90ac21e4fa39f54a484adacf17d0e059723b1046' 
  AND token = 'raSaMeUI2ZHdplXNTn+OkrtgkHQS9bVoKGhvj/V10aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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