Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf5a48dd9393684de74f09153fafa834cc19417f9830222777a705205e870145' 
  AND token = 'a+er6DeKMLoQtfPAkJVgp0G1H3SMloz2+hdQP0T8R1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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