Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f97b8018cc1242e494edd651c7f06257356d33fc2bb607c0cbc64018b1ad5b9e' 
  AND token = '3KNS8qubflQnl9w7WkT9XqWFB58Kwi0El8gOI9e38cY=' 
  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"
    }
  }
}