Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8775b5cee1f96da3f2500f390b9ed0f211145e39688bdff25014d3917c649ee4' 
  AND token = 'upv7hTTbEvUlZLFgt0uoPT1hkrM/k2r/J31Ohmwbk+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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