Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89eca678c6ab457aa4aee686ff252e8f690755305719bde29ccb3d6ee55419eb' 
  AND token = 'UYS4UbdVZ4V3gErpk1VUrlV3LpAh+wQxJqcVH8TQHms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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