Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43add065d884cafc79e23037bd0661df6e73242779a62f2ca505910c4ebdb082' 
  AND token = '4M89PrKRpv7nI8uRm0nbXEJspsnVDD0c9EgrSlLFvkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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