SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074b09570518e5211866242d24b169a5e5256f04c20334cd5a93ecf0d30be156' 
  AND token = 'rcmwPOWXyangX/jh9y/P/VBLj6XGGdHGWBYT80si0Cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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