Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ce97689474d07fc8d04a279caaef1ba9d2a936c9cb8f64f1c28731b3ef5ff92' 
  AND token = '7CFZ/dHLlkRKUoi3uwdSGdnyhbObtNg1lTNiPHrHayo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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