Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e95d84f5244cc3e76508189d0435e4dd772f984c42e155389ca3cefa11d3711' 
  AND token = 'aOSdrn4CYzukqkcsXMc8ri0kYUUQNUwIj/0tIGhC6i4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}