Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67415fec6a5d8262393c20855d8bcf73d3378e86bcbc399602a4aad35dbc564c' 
  AND token = 'DCmySQuGXBN5WgitsNJhNbybGq0hH6N4K3DQTy0TbsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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