Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaf946aaddcd76ce79cfa95d9f47ad1f2c093a9f7db05d9e11c61323c249927c' 
  AND token = 'H6bhc7dKVwHM8IbBNjFxy+NXAow0xybKZrTYOmD3HcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}