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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8793dde780b22152c228418bfb7d3b48074eed8104c7bd5f50b437d858090af2' 
  AND token = '5BDlwsBZ9PEC7DGRVca/NLIZn4qICzpN76lGlRacpUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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