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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41beddba1dca84fd9cfa9bfeb9fbf1a027471b5b674d5e26af63c000432355c3' 
  AND token = 's11TqIXwHjJ35MjNYbAIweh6rzukTrD18wR9dYImjpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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