Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73393afeb3778598b6a86cb02e4ffa54270ccde886c7b1ddfd60c1b81a50ed06' 
  AND token = '0xeH4z2+RBzXtXKRoJgLPO0Gtz+6wJSjRT8MTvz3cUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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