Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85995beb085e2e0f7ad5c428a78ef4a208a14a34f986270a561b760946fe6719' 
  AND token = 'AwT9zMJ7NZA0pVweWXYj0T1BYs2mDu2RCEPG23ieYls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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