Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7693bdf7b47a047b17aa1d3ec18db7630872a7dae90a5c4827032728494f6ed3' 
  AND token = 'djE5/2k4CLhLZJk3dtT03amBtkISMVjYvK1KwjVh4aU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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