Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98fb23d9da7b19b0ba7c503d7bd88706ed67f10ebc34aba04efbc47b337d50a2' 
  AND token = 'YEjKGvDjpM0jR3XpAIIbaAXRRwFDlVe+ptJIfYsXS4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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