Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4594af8bff108f2f77aae7b72c1a03cc4a0eb0602d39821ccf3f46e5a4278709' 
  AND token = 'ZrowCK/PJdbW68Z6rDca8zX1gjsw9YrpTErAEfAzLPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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