Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ec9f811bb8b82ad338d52562657537b784fd38035233026594ce9fc23a43a1' 
  AND token = 'juS/f+n2Y45VOHZ4ClQPHU5i1BbFX9omjIMtu2br1Ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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