Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ca5a657357862767cf7f0f025ecad2f236f6be4ba81cf43211426cdebc03837' 
  AND token = '9je2P8ucWli++pv35J6Gx5ffnDBG1qXbqJw2Q7KawjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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