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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '468c56d09db33482e6898e7a6e1a9806a217276a8f3ce54bad71295759ca9c2d' 
  AND token = 'Fc0sL1phh7iHOqqo6YlPSUp/CaX80Qhqb3ef0B60jwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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