Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5000d843063142589784e56aa312824f3f864ac37a8bb90c2bd3bc9380843db' 
  AND token = '9du7FxGic2PMC+n4e9nUfycXKrnKkOirTh+DAAH2lfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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