Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a1d2b275ee9bc3977a475d7a9f534991cf1008d9e5f7449ec1213be2ab75cb1' 
  AND token = 'vlMHtIOLKSCcWL6L6qmeLKQNPDsxvO/0UWcibowlad8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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