Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d5535bf9d7357df75c8084d79c490215350f9a116ae69ea86cbd3baaf61c085' 
  AND token = 'FBbvGxvZt37Ga4x2WMTAs2TNIMMrvUIziOLidXZjMLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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