Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '778c915f1ce62fb2e30e7d179a5bcdf5d26a8418a96116482b6e87cfd1b71f84' 
  AND token = 'WE81TSoRGehppo1IhWRWCe3/M+KWE+zt6wf0Z0/WXiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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