Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f326e94a6f2421d2136fc5e87266e68e045027d34b9ad4d313becb3f4054f50f' 
  AND token = '3+d90G/59ryl/bYWRdcRRDKzhxnAeO1XLId+q9Jo7AA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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