Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d11359b16a93a863c90501d556085d36a16e663c152648fc297285edd26e50d' 
  AND token = 'sjtIr6xKYKDAKvQidiogl5OQhTxCV8TRoMEi3X92I7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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