Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '914ed4e6af9ad9ad167696b8a37432bd37d8ae058b301228d4c54b2772fa7acf' 
  AND token = 'bXyFV74YyPDXBOwOVmeT9+vBrm7l97zDL1hM3zFhrR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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