Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc4e82d2d7ebdf67dd74a20d3f6d22a48d3b7b5f018ed413ec1b3d1ad811c5d' 
  AND token = '3qbCw0jnd6MO88i0EmCMQ6JWMtmA6ATuiRt/3xya7E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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