Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a80a7050b2918048c826f4b5abdaaa9d3a2aaf13ffd87ddb9837f8eabfa69284' 
  AND token = 'SMcg9tH1G09RVHFvd7Yaabvmgcack5qwEgQMKCe6FnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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