Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd29322c0176585982abb7d5b89e0d92a8fee2b3a01c2b04eba45f1b17d69f32a' 
  AND token = 'cTPotXlzaA5ziVDjju2Jy7BOrPoq0T9ehy9rLsCrlJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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