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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '831241980232727e01d55306725268b030ed0e41bcd303e2ed0fff96d9d3bf4d' 
  AND token = 'Oincf/oKFUT6k3KWVnZfWRqGgE2VmmL/6QXqQA0dt3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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