Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0575024e487a3be38b0c2cb6c5f55c949afdad6a6795ddb6d47227a4097cca38' 
  AND token = 'Ki/h9UsusU+K73w550Nb8S6R3kmPwcb8xzqwS62RNWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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