Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '697f46180272da43c6cb77ebc582589ada99d400431f062317df2921c21b10dc' 
  AND token = '7unU1qzufL0GpPfpcAkGqNtqVOmahIA9FtRl+zgy9tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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