Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f638584afe26e3d5ba40ec73eda0e840d02bc724804b3b83f5994b095dd675c8' 
  AND token = '/NUkT4V5F4LrFVc+vd8uZa6DtkrkFldWr4UyCPKhg74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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