SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96d2905bb3db4e8f6810b1a784cb2f58449203e963ae749f040991339a4e758f' 
  AND token = 'Mui0vJP1zqDUhd29moJXOnI+DI83ZlJG5qNmWY4P0uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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