Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd28885aa8f8343faaf9bcb7b2bc05ff7ff560b3df127c70eee3b8175555200' 
  AND token = 'AKNZHMOcf7OYSrA/Gid09enU0p2m50B61df1FjyRdF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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