Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58b6bcd2813c9b732ce8ece271854f87a952f893cb981d79e1ead9ada91b5ee5' 
  AND token = '4Gqe8GqsMSlb0cEPYkECgBe5sOJbzvQyQLjMVdti1II=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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