Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5960f63d59d30f3fd7eb9f6bfcf3077c810cb1a0b3ed95d37368bafc5a4b2b6' 
  AND token = '18iHoj8k1vquuKzhfoe4nS/nTJwHRZDEzFs6mr9fufc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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