Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f58e343e8c9a6c6726e6ac0d3807ee78b583c4a119aa218b5e8183339f7b22a4' 
  AND token = '5v2bvt5z8XZbYjMolgl0lt+7djFeOMbY8dtoAebnJvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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