Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7815aaa666a22eeeff9f22910d7d8a0de898a26ed5b606d7bc5ea3c036777696' 
  AND token = 'lxucs5l+H8vZo6+WOFBfc7v4OM/B05sgJGN2NpKhTcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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