Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e071da2c3c66dfbfbe76b8cbe5df28926bde78ead441e0a6e511b2b240d2505d' 
  AND token = '2NTKnJGiV8SymNHUBtfy4vO9UH0DAIyCkse5x/kFY3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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