Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0820b052ea0055066b4477c0c06166372e00af6c10eb308a6033b9f42edc27bf' 
  AND token = 'WlzDBZZfXScteLxdlSVbNr9REEMqJO07fhUQxCfm7xU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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