SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a536cfb1d2f342f3e86a9010cfcc2077abbdf16b75d9cacca986621eb8308fa' 
  AND token = 'xwI5TXGpZZWJjUZ1YQFpOT6XBYjlA12k+sWmt84/+jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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