Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c00e50b0c90b9ff733a4119e5569c16045ddddeb30bc7a54f08966853efaaef1' 
  AND token = 'Rb+PG2U9FO3UCb7ugIioahH7iEpbiknilzejPJP0HcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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