Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1746201fe5bdb7b2afdbe460f65e288ab6367006adc6dc1baa813bed32a9d99' 
  AND token = 'XVZUhnNhAqUVxPl+hex6s7RgxZX0eOgIZ2Z3dUg5abc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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