Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95703e2e52511cc3db63077c4d665cd31917ee4b4dc68fdeec2305fcd7308903' 
  AND token = 'L0YVItFrZ9Dsr8vDysY2Q7tMY/1jPDg8/7wYYCTI1QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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