Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '739f8cdeeaf3169e0ed22bc26d58c9715531c6e1bf69baacafb3b77e4d89f40a' 
  AND token = 'ZFn3u72mDpqndT0ac70obYEZmbF9sR3aGcOWcvzq72U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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