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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fd05a3dcba622eede1f247604d37f41bf8c9d94841fb6f4276aed248525a5fb' 
  AND token = 'FJNpKmpRz1x7Dl0jO5pIHF3u0j9Lq5HkUackd1I/hcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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