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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '436db4fca6f6c8ed09b404c9a855ad8d5a47151818cfed52298a4bfa8e01cdbd' 
  AND token = '64CwosVDTnzBhyYjBukmnHcuQZLn3z298sOh9+xH6J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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