Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44316e8c987ead97c54d90617ddf3cb9349f4a2aac6bf623139c0cf59131a207' 
  AND token = 'kAlE08Y1ZdiBKLuScMyyG4Z31bohGLFes4HTl3WSP+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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