Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df6d9a562f468c46ef89e437156da96b9ea85b468a7740cae9d756a9f8e29ecd' 
  AND token = 'RHrB/sQkl/k6QAMELUqGH6BaxonHJKE+TcaNbAbtASQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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