Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2a02bda009b94e24750c5bdf6feade98756952e8ccdd8a90dca276cbbf30908' 
  AND token = 'lynjjsGcjByCVvLZf93yarLi5JlNBLGUKAcjfVwiVtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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