Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a1eea39dcb70887da81d67b7c312da712cbbc5c3cd3fd5c2cac5b1e042cf36a' 
  AND token = 'j9e67r1nCQOmOlXMrKnOjMd6Q/kEtDmdprLIrEoqKwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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