Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a46fba11e3cbeca7ad7289562c4cbf43fba984717fe4553c3b3c9efe8ce154f9' 
  AND token = '18CoOdVU4rYvHC7adbxJkMy8owqUIaE8EAsQZRDH+JU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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