Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96efb7f3b58bbef79ccc24485939c69b86047368b46e1cab2656b0c6f4dd732f' 
  AND token = 'KcaVbSkIn8Ggr1SO+n9A5FX8k4tF3xpztxh3JkjencQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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