SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92a0eda4cd5aaf85862801d084c474fe906fc6441218ed0c46a7f632cf58230b' 
  AND token = 'rCjw+t4AFmE1wh/ElPYw+OUhfTq5ii9aLOkIlaBYJYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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