Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3446e375fabcf601a65d027727dfd0330409d79f65258bb95ab8b7b84e3e2e78' 
  AND token = 'pP8vgSggMtyCFo3J5FYUFwSrJGn7SKwgy401yWj0eEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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