Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda7dd3369ecbd672021a9dad6dccaf0db991310bfef5d38f39e76ea3669fa9b' 
  AND token = 'YrzGHycgIXpX56+BbVjumMjFLmq+mA97AwIU/6TCfyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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