Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bc8b76153969c797409d4835c4191816276621d015108a7ffb3c2b79d8e319f' 
  AND token = 'sFwz+RxvQSXbmTcEAl3HnRpyurZs5GLW7TMnIB8ZywA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}