Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88829573359e3041fd4afb60b5a6ad047f963f1ea7419e2b345ee2ff873cf00d' 
  AND token = '3r1m7jvOjH2OjwlZmABRWKp8O6wMBOWD5yO6a6FuDNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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