Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '464c4f0db64ea26400c21f79226e492317af4b9cbf38e81d7c8a4452ec4244d8' 
  AND token = 'DAXorqSBfZER1nvNoRy2XT6YgtVd2ZZ+hl54r4CXjVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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