Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86e9983550fa8c1a4df8518864a10b6a00d064d4973d4cb8632b0a46d8cfca0c' 
  AND token = 'tKy0WLme5gibt4QREMsiLUUGVceiMz47g53g29wOe+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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