Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f75105937621e8c041eab37b4bd6eabad3f0919696484fad18b86d3d04a3dbef' 
  AND token = 'f3rf/f4Geup9z1M6kvU41z8j5QGg/ABuKRFWdeZGgIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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