Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fbb22e21c4916d17b693d1e2db7dfd7df5de1fd9fc0371d9d7a16f7525501fc' 
  AND token = 'Ps4LtspMus5l31BfGW/6/caqSQZCkXuIJ5NlunCgiB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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