Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '525e5283835504b1c860cfedcca0907af491336fc943c370317acd3fea77d85f' 
  AND token = '/tN9HXT5dgmGBefRYRQOUpQCEPKgurCK2d3WbKZjTz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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