Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8387793422c19764cd01093386879483672d091bf2f20cb9134984623ff1861' 
  AND token = 'RYh7LS6a3yYNCZi1puQjl9vnbhyLkLdduVwxxyeaOn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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