Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a340672c86cf91764d37baf5ede58b26176f37ddec1d4cce075f1fde706986f1' 
  AND token = 'iSn1xMps6uO+bY3ZVsb7kvuYhE4RZVB0IYuG1VJ8XaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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