Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6ae3e94e3844f948da47a003687f0414559967917e1b9d72e6a1f05789054ec' 
  AND token = 'vFnu8B/yE8Sdbaq1z0/dDR9WLw7Rm6fCN7QA4XbCNdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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