Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbed7ce8ec291cd1755b978e7220d568af50cae3dbbec95ddf8d120973bda4a4' 
  AND token = 'ihRl4ML3QXX/crDYI1PhxQQ2KZ9Kl/mr5JplfTQafFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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