Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f96eaddfc82452bfe66055cb15ddd43340ae0ac9c58c81c086cb5396f66789dd' 
  AND token = 'yWuWs/mmjcoS6F3KQNKUcUtDzDeXUb753U/BwiOAlMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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