Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '194b4b7d4163e288bf329cd8adb96aa802031ae8cc98d1f667b9e0f91551b5ac' 
  AND token = 'Wj+nV+EyEo9m5c6nJ/4TpYh6eV8Shz+7ZN81U4csDp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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