Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a836bab4a3464d68d71da40ba0130a9ce997299c37fa98fb0a378a93384c3fcc' 
  AND token = 'fCozlxQBXw8foR4JZh1lGk3Xfmy+lya4PF0jmDw7efM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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