Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '029ca7ce423731f8cd9d96f7a1a9768905f7ec32f8d6fc9271a1efbc7cbdb0dc' 
  AND token = 'HOSLP46Nu1aV1ECBA/ngDeBayFufeb3Lt31NpCF9dc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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