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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda1d318e572cf79dda4f2e5750903b2ac229c049c6d76ddb8b9bc3e5a4a210b' 
  AND token = 'AMV5k0fQNK+xYSlo3+Z9SaqmN7K+hGEPXYVWb4ozhYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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