Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd39bbedf6c93b8cf6dc2c23eb3ea1303826b52c2626873f6ca7e42ba110b42e' 
  AND token = 'XaEIplStwcqvm/iOCThK7Vpx3QUn8cKfuIYAa5OeLYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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