Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b332faa5d6a7e59ce446be8b3efdecaf8f0fb975f5a7a757247464eab700e36' 
  AND token = '3ZvZfi8pk17O/UphRxw/qviZKxIUtrP8n7ucxaMaLNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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