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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8de3b6e95bbeeff107a504c115f54dd0a65e8a576c059c260857f78158401aed' 
  AND token = 'VDJk5QkLjhK6UpfPe6w8b4VAAT6HqNF9pG6KBPVBJF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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