Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11a9f07a2dfa4ff5f511365f57d20a4617dc3b6a2019812e17a8d87c3280e84c' 
  AND token = 'zVGg7ki2uxqiypEekHwPqWuUjOljY713CyNYkGlnc3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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