Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4222424c8adb3f8a2fbb831327dc2e8cd477192205968afe7013aafc6e6516f' 
  AND token = 'qGNVznl0VDoPfx4dnO7vZ73mNb3GY/B//2ri9N2ZFy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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