Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d47cc6a051ed47f785edc4f43778da59804e04ba75a0ef50e594c04ce489b4d' 
  AND token = 'qZECFz3CJSJEU9a6nuV54PeRtJAwfIy12qOp0a51hss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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