Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8402a14af12355b7010274d10e701a0548cfa8a9b88685097f1ae91f6d1e56d2' 
  AND token = 'PONIp6WXIfzlukJpnaWj69hHRiIvDiNClAMeNunpl58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00098

JSON explain

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