Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad0d4799f098fb99875f19f075545ce0bdd0a7af2850cf5f439b5f57dbc235b3' 
  AND token = 'OY2fs3ZkauFCjDFv9R52evKS+1LbBUJTxJNVaFSX/k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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