Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07641a7e0004de76c6fb9ed886ac01e1bac93e14e3c7d3cfb14e53dcda0c8c28' 
  AND token = 'OkO+wODUnbOCyMrUrBhOrHN/L2JvETpjVlifxG+b1y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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