Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb7e3b0fecbade0e3567bd091b474c888558d520f221c841b79de79af85599d4' 
  AND token = '0f7+wk99OW3Fe8Ah78A4CMSuuZS1hVENYiHsCAG/HiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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