Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6baf5b3dd4d22ad5f32e4c19a9b9209c66ecdaa07f3872ca4b2d932b1fd3253' 
  AND token = 'ofx2mBv/FdIi1yO/d9PNnzdDFSzFiSZYVzJ2K4mTM3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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