Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad5f39fca31b22e82fe1f5ea1b081ad5f3ebc1d7cb4eeb5b94393a0d165ecbaa' 
  AND token = 'SrcjhJditKJepUYojiz0MtrvipIEW9KX07HNb/v8EVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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