Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd14bdd0ea6795f64b67075ae36b673d4c767a8f347a17c07e164616b7d4be61f' 
  AND token = 'gkc80n7E7WASKG7mtQTdjPjhfLKWZ7vKfaNFZt/9W/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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