Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e15f3ed70b81ba6581caea6052f12fa0efe739efafa77a7dc65c057bebd817' 
  AND token = 'mgo1MnITccHT7WfGvex7tu0Orx/Kdi5VoZUA7I4FkTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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