Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dd4c02ba2b3f72f07eec975318610e28302701b4385ec7278824a473b4996de' 
  AND token = 'YA7rJj8Lq/8jfd9QWG8XkygD78iO6VHsHBlX9QHpppQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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