Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42230d2d22f9e0243e019ccc8415012c41e3d9d9c0c3de1e2fdeed201bf83163' 
  AND token = '/I8D59l+AK4NIJ044yGj21gU3dXnhImwmbpmWNOkb8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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