Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c5480bbf827d89f2a163e99d3c1f70eca9225db42e0cea18020237012f1b9cd' 
  AND token = 'J1FpN6d6NKo02kBw/K0Jlhe0+QJTz4IST0LjkBRMPew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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