Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e4745e99ef9830d77350d762fa995772c8dd4347d8c158b0f307a2f7d9c3a67' 
  AND token = '+23ObLpQWSErBHVnoFNw/G8aodxkaTBgOZ99g3GT6Ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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