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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '841185522a3343e2dc6bea45f48248efe04011e21229d42de8b5db4b36fe49d8' 
  AND token = 'BjWnpvAHRlm7AZQTcWsLd+g2yf+1yiSqy8ExvAZE96U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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