Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31b735b5f5ab9f25cfe981303134a0bfdd76e4c46093b384230414e7f6483c24' 
  AND token = 'zPdbQNChKQyy0j0J7fZSQHC0c9z34+TDwCFnHKDRM98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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