Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0885396b5eed1d1fcce34dd5f4e38ee7c3987d8a6259b5593c30cc714f27fe6f' 
  AND token = 'nU8aiUUUWYm5dixN93GUoKWEo32/76DN0gft0kMlQNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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