Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08e05391e9c3d6f16d46666d7d7a1c264c45267a77a46d5cace43ce4e97ff7b5' 
  AND token = '8YeeDDrf/NR9gG7lkjJSC7Zy4BKYKpwIgkcLBf0IdYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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