Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0060e5ddc0e435f26a068cd10592066884a21efe1c80fd4418111ef69b6d566' 
  AND token = 'aqT62GzDGqm04dcxeAv9nKs6hiGVf7DZglogb/CD+UU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}