Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '582dcb0a003c110a906dfe00cfb601febbe7dfe1d0441634dedf69f87b3f057c' 
  AND token = 'z/h9pb5dgFD30P2or9Zp5uEzblnbFSxiYhaPMkYn540=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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