Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a8069f3851bb4cd3fc4a7431dcd899cbf4c03625807c8b02e9f7b4d817e9987' 
  AND token = 'qq6n3gR945OUnmmnxyJsOqNjtvvtErrJQlh6QFk1Q1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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