Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a696ba667faedae7346db5a606880941bad4c732f9b8afa322def90436ef1366' 
  AND token = 'fhNs/5qwBBdAsK53yPfN7Wr9olZIxuFP1poAxwIcZH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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