SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22e06bd713ce8b4f40e29592a91ea615e35b370619132be8f6bdaf9ea24d9931' 
  AND token = 'JmeeAO7hN7jYQ5ua/4Ch5CqVSlNvjyJJ/6qwQFYsEdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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