Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c685204621fa0b624664181fd1c81656d30af05213f9f93d89527a2e2c74ba4' 
  AND token = 'u19G1ZcT9UORCuSuDTJ82sOSxwn8wphPK2/A40Ji1NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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