Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5394483794abbf8fc954b00a84b05afea9989ff6af52c68edd650837d2caf66b' 
  AND token = '165h6rvTGdNKMXcAG/9a7sr+maD8p5erNnThETfcDbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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