Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ae8c34bf4fff66aff4cb4ed38beedf67c4a1383fff0ba5d7fb5c604f1a68e2a' 
  AND token = 'iniPmCkbpxPP7MAZDeycs+D9fsIr+G3IvCV8IyNzljs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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