SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e719b32e7d7a9ed9e66f4b8e8bfea0ba805dd8f69e49e1532f437caec37e3349' 
  AND token = '0j7vAZnB//+tyZFsxnXSHeOhUgepzM+ZqVw11m6QqXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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