Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41f1e5f41c43c3cec6e05070e2c03e623b27b5e2d6880d58dd9a32c9b059b11b' 
  AND token = 'ACY1VzM74JHqEt+pWmsAWmJQCn7wtjs30BG3HcRRQIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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