Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed1c955880982cdec87125f6ead85afef68fc841587ece2d6050384cf2fe0fe4' 
  AND token = '06A+XuA07e6pwazhweb+Fow9AfUX310+LyAPeJ6lkuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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