Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '749b58a1f4262547f123e341124b8df2229265c02f4b9f2121f6c033a19aaa1d' 
  AND token = 'nRwe9RVwATNtjNKv+7QBgLOU9k4/NaHxu8f1oArNFbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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