Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b9fa5508277a6148e1564d16a4e6ca5833af6faa36fad9ce2d7f567ebec75e3' 
  AND token = 'EL9QZKeSkxKl5in4CX+6POiuvapOnaXR5r6USnyKdHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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