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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3b24a52c2d075036f1fbe532c2f6c1f967ca2d417f7c20e6efdf8c15a07cc27f' 
  AND token = '/+ShpQtJX6K86nx/MJNCMA0tHleNoo/Py4ORbeTNCSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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