Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '846226fd7046ef58b7b9595fcc4ea47ed45245e932822d816a94745cd3e70a8d' 
  AND token = 'jCZO2TwHtXkRcVW85HHyplYwaY2T22v7yVOdo0pPhJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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