Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d426e50fb0fa082af933ca2e69120a0aa5b346e8cb5ea91c865dabf07346de6' 
  AND token = 'H9LbszShK+0XkCMoWAacC1RUV1UWQZrW7fkeQ8Zkhow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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