Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef3bc333eae737c22583db3fae37c35df35c4c1a82c6f71fcf59544973b2bfd2' 
  AND token = 'Qfle80kLwF4yDvxYbf0KxMQzqQRKzAF/r/LNttI0QnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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