Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef07e1f439ecadb65ccbe8079e05874e91807e0db61b78fbb8eb1f0d693a9760' 
  AND token = 'D1Fv5JkILvIkLNQgjT9kdQkYaliv0nSyW3OFptOrVpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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