Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '160c47a2f101b16fd9aba4195a2c21dade67bd8aa295e5afb36ebd4100b89a5c' 
  AND token = 'YwIcH0wutd1zlJ52SZLfTIeOqAAaAMdZVehPxPhsP7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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