Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '163e1e774e6b69a460bf0d66b933002c27dc164522745ad809d99805e95db00e' 
  AND token = '/N40kloWAAuw6lu/qOW9NMBq3BEdMC8qKB2MQC53KVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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