Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d9df6b6a5f51405da735b6cf641f21da80ae29ed9d222bbcaccdd7a1c5bfc9d' 
  AND token = 'gZJEdHQvZ4np7aoB3YSiDde0ZphHB+sn5f7zXGe020k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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