Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401de87a9b57dc4df3aa77cdf4112770a5ce1f70766c91ba66f348ce31e85a28' 
  AND token = 'zUfUQ9QQNAiBJzvdcGocExncqhFV4K7rsWgdnhuok4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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