Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c7179eff164fc6cdebee13f676ae59643417cf15f8489203b414332e72903d5' 
  AND token = 'qXQS6vXefHDWmC9k/prc3tpL3F5UGdiTTxgByR0yJ74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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