Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64b066de825ece0330dd5c732e959a9f0bee357fa503bf995141a14eea7856aa' 
  AND token = 'ffpss+fSRYTrJma3R2IWxvAnffxnWBrlg5JxVRiO3xY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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