Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42e21726a6d09a3410814d2d0145a3d6050f3d7393a145a7d378571282624dd4' 
  AND token = 'TIyFBnoIPTgyOXpDBaUaOHnyNbWcexLSEhc8hdPKnhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}