SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ff49659a1d3ee8269e1b469c132f3ffc18bc7351f0458fa7b83a7654e40559' 
  AND token = 'XaBbW/bivqquv/wH5WMxo8jk6uuNMrKxaFVDoj6Lhf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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