Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a054a4a56cb69b8d71e2e8da66f59a46bef0097b3dd47d274ad879c0eb9ad5' 
  AND token = 'MZ1Z9O/aCai/gqZyH95BgrvvKtgTKQayJSiqNizlsqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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