Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad2901ac8a74ae1bc60f29dd14a154e47c50313ab5f71f184a12369f1ef4e9bb' 
  AND token = 'Ktjv0ocEeiN+bqW99JA3gjSsaCCMwxNel3JN8mVN9fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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