Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38bbfb5f1d90fb8a8fb7849562fb40e566bc149dc57e14ed678f0a99b48d67f1' 
  AND token = 'y8OJ5nomxgJSvcrv6NLvkbkLQPnvxjIrx37rBI0ZbKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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