Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cf8e1e378db566cc8ad5fec4f1db606d4897b3ef4fa3c209ca4bd73c3c5669c' 
  AND token = 'jhqX5gopCQJLXqnL6Bc9kPKkESX5+P63rsDABHiItDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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