Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b77dff49fd9e5dae8ce4efbbabb4b09bfb53268fe544d0a0a432bd8a02f8fd6' 
  AND token = 'phKBJTxebJqS4F3G8XivNSe00OGJeJtkNouzV+OgcIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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