Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084a19e76a66f745f813d8ced72fe13f16b1b85ba69f1991efcf1396282bc216' 
  AND token = 'urwKYIw9tKS9SoN7o4gzDgVudneklYgNVoe5XEOFCbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}