Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d8d1a4dad414c95147ff0ff9f515a9152bca7783ab0be74340571e6305a636d' 
  AND token = 'HxLkGdg5Rc15MH5bFdgGQMSMurl2/frQmAFpZi+3Mcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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