Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44d8e78a09866e9d4809ccaba6b61b2d63404d4042c3321e5ac07ecfc2eafd37' 
  AND token = 'fDY9yjFMDETaWw4iWS+TcTJ81t3ks/ZjRqogK7u7wCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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