SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7065821096ac24183333b784eddf1a7cac7119f11136a728116bb2f8ee0c29cf' 
  AND token = 'GJnrnsHh/hGX/4fvrwvc5IqjUApwnUzyq/7j5/I6mmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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