Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeaac4bf4fefaf0144c59bdb07df2f77ab261d38d3d15214a90da19218f9e861' 
  AND token = 'iyz1md305rrfCAfxGBaYa6R0D/5AyRVE8T39aGKVWWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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