Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa45d791e58bee17a66720dcbc00113b655472f1dcffbe9ff017d829db45001e' 
  AND token = 'pJkZBKqNOlhC+onvScZqR5876erfo4xKrZtlC7mJOm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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