Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff022bdc6f20060c8351c0444ad3e7cbf5c0fe8a91951a8fd6a107f6ebc349e4' 
  AND token = 'dZSITLvzSrjfH34HAowbo1xfgL+jp1mCVyi8HnNYEXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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