Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f05996aef798145ce5f10dcaccdde5df19f934e2603dcc45fd41b0ef08ae103d' 
  AND token = 'IYmdlRrTSR/kQOfbMXxhYu9tlaJjDJHzV7CYLSerrVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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