Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db29d4101f6e2059635ae9019d25c75d01e62141853f5c7842bed6d3d3951fa4' 
  AND token = 'Gw4hhLud7x7sZP0jHqG7mfpmEVlIPC48RAKdxUUElVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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