Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77de903f8c0e746c13bdd68af4f86ea42bb77e9f75c2ea428bef34ece0ce5e3f' 
  AND token = '5X0i2V3qo/6LmVwZ9aiiyVmy8A+NadO4W3f0PNGt6SM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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