Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14548299c9f6e11dc28888d45652a5dea1f1fba0d29db4fd7278092f7ceca84f' 
  AND token = 'mK9eIH7vbU8yteYbFd2puigbj3xqMZfQsxporBSRAvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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