Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98704329a0bca780734038223525a0852e3aa631c1b592e894603a72c9d885de' 
  AND token = 'Ml2nYWlPfeFC5TtOlx3uVl+vzcLrZStkU1sWHjO2GtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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