Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '985d742fe6cc982e13dca34d22efc495dda1fbf01ea2a91249fe989dcf44d2e9' 
  AND token = 'MhOs1m4F3PjXbp1M1HjoQOFIaGgMy9mypUbRVgfy/dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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