Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4954f93adbab14b42a9ae83ffb340922fb47b08cacd1d3fa5cd5439a80e35b63' 
  AND token = 'Qqse3pTsO3yTfimnup14+v0qysLfBpxv8KgtNt7jRPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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