Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '877fbaf04761ea50d140f3cdff8ba774e52864054fb3f3fa268608766ccf87a4' 
  AND token = 'MJEMwU9+rN44024niQ3A+2yV7H20mZIzRz7MDTc+OOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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