Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3a9e7801bb6eacbf0b1a654c023e9ce1f2caff5841b8146bb5ff7b39ba7d581f' 
  AND token = 'DG3I4cpUxyIfw0yudYvr5o8G6aEb7PepSKy7u3FlIe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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