Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef901e652968c6de600b547d520d7766571a6055234df5dcc8410d2fb845481b' 
  AND token = 'AraD6Vad00VAoPmtbFmJb0Tyw4qFtcs5DqgCW+cGyo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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