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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba642822ccb8b36f948bd269d465eaff018cba9d9c28f93bfc1c50840ba8a66f' 
  AND token = '6vVGRw8lo20yXpCacUzWLGBDO3YfQieeINJUpwnSKVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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