Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4bb84d44ea34a56037a95c0f01ddb7cde1f9fcdeb03733cfd34425303ce9e49' 
  AND token = 'jmcATERAGpzUdqAPepS+lieUATW/3wmyVR6jO0IRtBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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