SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '000e79c5753ec3defd3b019a7e8017e7ddd04fa09ee2a6ff2b3645817844991f' 
  AND token = 'WgudhaQc6o0jzBkWJnco/aUubA/1wQXCJZ+lqi1ZGGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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