Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5f5de151f378d3c9e40331247235df101a27c87bd31363c67b75fe791ed3521' 
  AND token = 'bkxh06aUH9TeygfdlMJTW2wBZtfzla5pQcXvVGhMIgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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