Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ed1fead70aba025146b1c7ec96cf7b6ec7ccc9ec7c47a453306be64165f2052' 
  AND token = '/COMf7UyGjfEsZg8txsYFeu5wBMlbJ1OuDd8mFi1bzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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