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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfc14f39403b99328cb30dd7c5e17a833ac253595b6b2d86944b7137fbf17e99' 
  AND token = 'UZTt55iFVTD/O7PcPGVGUvhijw46QUcSWvWHF0vQd58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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