Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2500f006f93b3349af4339d08e9ccbce909006751a9e4d888e42eb6aaafe836' 
  AND token = 'FCOk5aW6X8HlJP1IRCXy1NXd/Gw7+kNu43Lwct42B/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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