Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9261b397e351fe758876b70033f90d2f9fa09ab31744009bb3ec66cfd41329d' 
  AND token = 'jL67dH4sOZ0nWChd0M53LFKF34fcBczoGY5CLPQvTcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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