Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eec745408f3809004709287ab8cafe132cf8d66aae6a719777537207af1c75f' 
  AND token = 'MGPqA6i732LPNY7Kc/jPkHTYmWjD+C25EpQt7tOBg1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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