Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '699c8de08102bf7ec18c224b888e98643d0875743ff103abc69a72ee37b95e15' 
  AND token = 'KcmkQlxVfBbdljnzua3eEiBNCk9WLqqOGKlTi5q9k1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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