Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c64aceb826206a9e8e0bbbbb72d2e1f1066f501d756a57af13bb56ae2d90c87' 
  AND token = 'nSQ9bafix5aT+X9g22q/oRZZ8ijsp8QDZv1Ol2x7ccc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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