Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46070969fc678d3313f3bc1e710d6db415c5cdc3aae9d34884766ab861ff0948' 
  AND token = 'AHVNROuAEpH5Z9tbXHWAATfDDS+sjKFgw0gPobytlTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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