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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f58429c197970e51480c41857100b87dcf68243cc8a4a5674c5259b49cc9c22' 
  AND token = 'BDrKX5PZjQW0zONN2oVM35tsx8gRwG14erVHtg8mTiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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