Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35098c6cec2823657a14d24dcd10579c786a40e43536b704cf51d5d584f6a8ef' 
  AND token = 'y3QN8A5iY5v/agpSb7f4zFK/VYTXXtfI0v3zVNrDiD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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