Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba167bf19a5af81c8aa140fa7e8d8d28d6494cda4fa8f1448e1f1ab470931604' 
  AND token = 'W6zb3a3PX/lQ2TzimXQXfDwdcJbatyNkyASf1HFxF0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}