Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5756ded4cb8692ea5d92ec2603b829b5b47d3cbaf64b69cbf710ee1999fdaf9' 
  AND token = 'GRFBiqJpWVpPisj2lQOfcHC89JA7TgrV0LcHefWLigU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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