Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '102dd714296e73d24bcd8eec1a2ed068bfc3d63c96b3c44e019f9b140dcf53ed' 
  AND token = 'mwuB9+AnM5QXMzPdPPMoRC4hH7nChRLwvUxJSe6dGm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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