Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1303da59fd3367c80410601fc7b95876ffa3bb0fa47cb87103ffc9a035308f96' 
  AND token = 'AqNco48vhegt4Df7sNIyxVDq9hGvL3FmymKHPPbsefI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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