Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbd96151a8d54bd5d7946b430dc6ef438d2abbe6c0c28bae5c2551521b2b8c67' 
  AND token = 'DMWNB5XDvYlqEhCfAQW2zzLBbtHZ0UGkQnsQdvFuLLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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