Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b72299d72d61f7e3f1f7da812f52c83da84662869acf52fd11f7c3af3a9ecd2' 
  AND token = 'Kqsu5R5HqyTjsOJVWNoQ9inIoW6Z67W3YSNAlnKNwcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}