Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '367d98a52236263d252d3d2c7cb6266edba905bef4a294169ae0ca9ad17f03e3' 
  AND token = 'jfdCqxtyJnf0S2Q2G8NuInjgWbVounqvLlfhj58qEVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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