Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f529427240fec307376e7de51266dfab868b2a5d08ceb4b4a2665c0970e1a6cd' 
  AND token = 'L9JBcMMCPWORYix/v8dOGYO55QspZsxbks0HzyiK2Bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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