Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b2ffccd5b5d1a944ae6d411d6bc426d4ecfd3d57ffebfbe29effa414f5beff8' 
  AND token = 'w8kIQyFiLAfQCInhCejUCrK77Miz8oBywhgf6rLSH3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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