Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '449253dbb3a46020b143332ba5984c7b683a5a3b048a41ad04d2561d22bb0a07' 
  AND token = 'I845T3GCndTmXkwdsOQoMZyeVZxs7xwCB6Onc4wkhFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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