Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4beff2752fbc614b56ce26f6712663314c4329c555d8d288c965a6a164eeb57' 
  AND token = 'CO6vuuS9z9rm1K6OaE35MsYQcvGgiT+Hf8tNd5tQY6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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