Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0807b1b76c8f4e9bdf2d89709c18f26c1096205b5f5b4cf1f1d25cced757a8ba' 
  AND token = 'x5Xf7XDPqJfBE4Zk5FWvrE+lAd2yRkOsQO6/j4IwXAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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