Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd9231c1bb63436084c0d8b2bc4410829b142937976c8e6d32a24dc3189a2aba' 
  AND token = '1kA6YGtA/YsBjwVbbD+SAllXNSEkh6CXwKdSAi5isvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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