Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b70360dee3de572e9553bb349d2863cb79ad53ebe5fc7c33c6755dc5bc08f06' 
  AND token = 'irVwxCJh9dtXjaWt0dKynhH912U7vvGNY+Fp/7L3t4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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