SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06022b3e35f836684376caa8b569358a01c9bfe77cd126d0a16914e35c677021' 
  AND token = 'QuQBWkvg0xvhOXUuOZJ/YpUfb4xAc3p4jczrsjNIBQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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