Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2edff4172aaf11b7cce8aa9d6858388fe72958efe5c27a46a8bbbb8f17e99c5c' 
  AND token = 'X2pX17EBFKtBn8nL64ptboxBKEPeETS7s/KCuwQZltg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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