Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '958c35a491191be926d5ad21a40714c942113df1d33cc54903877b85f7ed4548' 
  AND token = 'W2N6t/37bRHjE18Kfp19LKdh/UwIjbQhEz6W0NJTxJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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