Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bef3bc80ead33a3d6adc09e8afdd42fb63db4dd9b44a42693ba4e16a6ba096f' 
  AND token = 'HtUb7vh40dCjogV4Dx9mgr+dStQfT8d8lRT6B8B3u3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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