Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5547f63c9a4d3b81d9ef9daeb143fc55bc1330c298e91a7fcc9bf932f549f470' 
  AND token = 'Qwemt9Av2uzeD3FZBfpSLFF/WEQqi+O7kHi9B/JFIe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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