SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ccce104302f7701429eb25b97506f091faba535d8e0138d4997f7a45b246a326' 
  AND token = 'qPa+FFXWuelXa4/fJh7KnzfFXgYce5bZmaSmR2XHLvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00163

JSON explain

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