Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a90625d693e8428a61cdfcd8d413fbe6afb4f19198b4b56af422e8eecb667e00' 
  AND token = 'xXWwWsh4DjVEQnELf4coli2+aNDge6GVS5br0u5WG2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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