SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e74114bb4315aa41d4c0ae37f6648a416fca95d1cb5b41e0f0d2988ff7aab8d' 
  AND token = 'mwNh3fJYrEzzo8LBnG4hz/lRoCY2U1g/pKwlMggf9D0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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