SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '385d28c697e1a21055ed0d91f1016ffb8b17b2ad72d3546cda15b63d4780151f' 
  AND token = 'H/iGWUWv0a1Jcrx5/nqTBpNIsgRjilVC2MZrv9EaO/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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