Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72f8e8306c0f51db1baf1aff2c7f75383407f29ee69c82e0dac1f9686fc5e2a8' 
  AND token = 'bLM7ChqNsnxfp7a0hI5fOI401a4noqe4ahRYva/ZCa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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