Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba769c712078306784e58bc97fc977ba65c52dcf77ca12a0b7de098abb7c10a' 
  AND token = 'cqgOVFM7YH9RRHdx/mECpx8Mra/d8NdUp8cVl59Czlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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