Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cfd3688444949db061d6d1f2db40c5305e282461dd435f130f7b3f48aea34a3' 
  AND token = 'Bm6bRITLqmwdyiuqyyfRxPQqMb8VzSgHgqgadtGPu+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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