Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af657bda1a6f61949b5c1751fbdaad876ce43609414e285a49619bc09426c820' 
  AND token = '/L7WBXYCnm360XP9snI/PHkfqU/bFxIwK9o815btAhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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