Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85f00fdf711ed98498895a5769d91a88fa702e3f285ff54ad7ad4cae682accd' 
  AND token = 'FihKGmJL09mjGeJCEtjrE4rVJOJR4+QEuPyM+x684iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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