Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd461f15e39514bb804aa4a6c4922b5ba15deb207e01dbd6887b924814b4c156a' 
  AND token = '68vyaKdyAnDKzv1ScrOCgJaW6G/a3ylviQ4oEjweiyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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