Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0569d6f7018c069fee15162132621fbcbab09738dcca1e812c88680aa67c4af2' 
  AND token = 'lWFpP6lS1OrRqhnuzpB+J3EZMXcCZrXO76eFHQazTBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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